Design of Cathode Coating Using Niobate and Phosphate Hybrid Material for Sulfide-Based Solid-State Battery

Article Chemistry, Physical

A near dimensionally invariable high-capacity positive electrode material

Itsuki Konuma et al.

Summary: A high-capacity and long-life solid-state lithium-ion battery is developed by using a lithium-excess vanadium oxide as the positive electrode material, which shows excellent reversibility and stability during electrochemical cycles.

NATURE MATERIALS (2023)

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Article Energy & Fuels

Ionic conductivity prediction model for composite electrodes and quantification of ionic conductivity reduction factors in sulfide-based all-solid-state batteries br

Kazufumi Otani et al.

Summary: In recent years, all-solid-state batteries have been considered as suitable candidates for application in electric vehicles due to their safety, rapid recharging, and energy density. However, the ionic conductivity of these batteries decreases significantly when the electrodes are composed of a composite containing active materials. This paper clarifies the reason for this decrease in conductivity both experimentally and via simulations, and proposes a prediction model for the ionic conductivity of composite electrodes.

JOURNAL OF ENERGY STORAGE (2023)

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Article Nanoscience & Nanotechnology

Microscopic Degradation Mechanism of Argyrodite-Type Sulfide at the Solid Electrolyte-Cathode Interface

Yusuke Morino et al.

Summary: Interfacial engineering of sulfide-based solid electrolyte/lithium transition-metal oxide active materials in all-solid-state battery cathodes is essential for optimizing cell performance. Surface coating with a buffer layer, such as LiNbO3, is a typical method, but it may not be sufficient for harsh environments. This study investigates the interfacial degradation mechanism in half cells using Li6PS5Cl/LiNbO3-coated LiNi0.5Co0.2Mn0.3O2 cathode mixture. The results suggest that the degradation of the interfacial solid electrolyte region strongly impacts cell performance.

ACS APPLIED MATERIALS & INTERFACES (2023)

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Article Chemistry, Physical

Degradation of an argyrodite-type sulfide solid electrolyte by a trace of water: A spectroscopic analysis

Yusuke Morino et al.

Summary: Sulfide-based solid electrolytes are promising for solid-state lithium batteries due to their high ionic conductivities, suitable mechanical properties, and wide electrochemical windows. However, the hygroscopic nature of sulfide in these materials leads to the generation of toxic H2S gas upon reacting with water, which reduces the lithium-ion conductivity. On the other hand, it has been observed that conducting performance can be partially recovered through suitable heat treatment. This study employed multiple spectroscopic analyses to investigate the degradation and recovery mechanisms of a sulfide solid electrolyte under moisture exposure and vacuum heat treatment.

SOLID STATE IONICS (2023)

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Review Chemistry, Physical

Advanced Characterization Techniques for Sulfide-Based Solid-State Lithium Batteries

Yuki Nomura et al.

Summary: Solid-state lithium batteries with sulfide solid electrolytes have advantages over liquid electrolytes and have potential as next-generation secondary batteries. However, they face limitations such as decomposition, degradation, dendrite growth, and slow diffusion. Understanding the dynamic behavior inside the battery and using advanced characterization techniques are necessary for designing high-performance solid-state lithium batteries.

ADVANCED ENERGY MATERIALS (2023)

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Article Nanoscience & Nanotechnology

Degradation Analysis by X-ray Absorption Spectroscopy for LiNbO3 Coating of Sulfide-Based All-Solid-State Battery Cathode

Yusuke Morino et al.

Summary: The surface coating of cathode active material in all-solid-state batteries using sulfide-based solid electrolytes is a fundamental technology. LiNbO3 is one of the most representative materials used for this purpose. Analyzing the performance degradation of half cells exposed to harsh conditions, it was observed that the Nb element from the LiNbO3 coating remained at the interface, while the X-ray absorption spectroscopy (XAS) spectra indicated a decomposition reaction of the LiNbO3 coating, leading to oxidization deterioration of the sulfide electrolyte at the interface.

ACS APPLIED MATERIALS & INTERFACES (2023)

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Article Electrochemistry

Impact of Surface Coating on the Low Temperature Performance of a Sulfide-Based All-Solid-State Battery Cathode

Yusuke Morino

Summary: Cathode coating is a crucial technology in sulfide-based all-solid-state batteries, providing protection and suppressing side reactions. In this study, it was found that coated sulfide-based all-solid-state batteries performed better in low-temperature environments compared to uncoated ones, demonstrating their applicability in such conditions.

ELECTROCHEMISTRY (2022)

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Article Electrochemistry

AC Impedance Analysis of the Degeneration and Recovery of Argyrodite Sulfide-Based Solid Electrolytes under Dry-Room-Simulated Condition

Hikaru Sano et al.

Summary: This study investigates the degeneration mechanism of an argyrodite-type sulfide-based solid electrolyte under low-humid conditions. The results indicate that the electrolyte can degrade even under super-low humidity, and the grain surface degeneration leads to a decrease in lithium-ion conductivity at the grain boundary. The degenerated electrolyte surface can be partially recovered by heating, although some small-scale degeneration may occur during the heating process.

ELECTROCHEMISTRY (2022)

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Article Electrochemistry

Cycle Degradation Analysis by High Precision Coulometry for Sulfide-Based All-Solid-State Battery Cathode under Various Potentials

Yusuke Morino et al.

Summary: Undesirable side reactions at the interface of cathode active materials and solid electrolytes in all-solid-state batteries have attracted attention. By evaluating the cycle durability of the batteries and observing the morphology and structure of the interfaces, a correlation between coulombic behavior and material decomposition was found.

ELECTROCHEMISTRY (2022)

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Article Chemistry, Physical

Deterioration process of argyrodite solid electrolytes during exposure to humidity-controlled air

Hirofumi Tsukasaki et al.

Summary: Sulfide-based solid electrolytes (SEs), with high ionic conductivity, are promising candidates for all-solid-state lithium-ion batteries. However, their conductivity decreases and toxic gas is generated when exposed to air. This study investigated the degradation process of argyrodite, a promising SE, primarily through transmission electron microscope observation, and found that the decrease in crystallinity and the generation of decomposed components contribute to the deterioration.

JOURNAL OF POWER SOURCES (2022)

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Review Chemistry, Physical

Corrosion Behavior in Magnesium-Based Alloys for Biomedical Applications

Liming Xu et al.

Summary: Magnesium alloys possess excellent biocompatibility and biodegradability, but their corrosion resistance is relatively lower. This study reviews the corrosion mechanism of magnesium alloys and proposes reasonable methods for preventing and modeling corrosion. Additionally, composition design, structural treatment, and surface processing techniques can be used to control degradation rate and improve the biological properties of magnesium alloys.

MATERIALS (2022)

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Article Nanoscience & Nanotechnology

Atomic-Scale Observations of Oxygen Release Degradation in Sulfide-Based All-Solid-State Batteries with Layered Oxide Cathodes

Shunsuke Kobayashi et al.

Summary: This study reveals the accelerated interface of oxygen release in all-solid-state batteries through atomic-scale analysis and finds that oxygen release can be suppressed by forming a LiNbO3 coating. These findings are of great significance for the long-term stable operation of all-solid-state batteries.

ACS APPLIED MATERIALS & INTERFACES (2022)

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Article Nanoscience & Nanotechnology

Dense T-Nb2O5/Carbon Microspheres for Ultrafast-(Dis)charge and High-Loading Lithium-Ion Batteries

Fang Liu et al.

Summary: This study presents the design and construction of dense microspheres consisting of nanostructured TNb2O5 embedded in amorphous N-doped carbon, which exhibit high lithium storage capacity and fast charge/discharge performance. The obtained material provides a potential solution for improving the practical application of T-Nb2O5 in lithium-ion batteries.

ACS APPLIED MATERIALS & INTERFACES (2022)

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Article Chemistry, Physical

Degradation rate at the Solid-Solid interface of sulfide-based solid Electrolyte-Cathode active material

Yusuke Morino

Summary: This study analyzed the degradation rate of the cathode in all-solid-state lithium-ion batteries with sulfide-based solid electrolytes. The results showed that the degradation was controlled by two side reactions, and the cathode's performance was influenced by the decomposition of the solid electrolyte and the involvement of a coating material.

JOURNAL OF POWER SOURCES (2022)

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Article Instruments & Instrumentation

High-temperature treatments of niobium under high vacuum, dilute air- and nitrogen-atmospheres as investigated by in situ X-ray absorption spectroscopy

Jonas Klaes et al.

Summary: Niobium metal foils were heat-treated under different conditions to mimic typical heat treatments for superconducting applications. While vacuum annealing preserved the original structure, treatments in dilute air atmospheres showed linear oxidation. Exposure to dilute nitrogen atmospheres induced structural changes, but no evidence of niobium nitride formation was found.

JOURNAL OF SYNCHROTRON RADIATION (2021)

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Article Chemistry, Physical

Effect of mold pressure on compaction and ion conductivity of all-solid-state batteries revealed by the discrete element method

Magnus So et al.

Summary: A discrete element model considering plastic deformation was developed and numerically implemented to study the behavior of solid electrolytes in all-solid-state batteries. Higher mold pressure was found to increase contact area between active material and solid electrolyte, leading to improved relative density and ionic conductivity. A new correlation for ionic conductivity based on percolation theory was proposed from observations of poor connectivity between solid electrolyte aggregates.

JOURNAL OF POWER SOURCES (2021)

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Article Chemistry, Physical

Electrochemical and material analyses for sulfide-based solid electrolyte-cathode interface under high voltage

Yusuke Morino et al.

Summary: The research highlights the importance of the active material coating of a cathode in all-solid-state lithium-ion batteries for charge transfer. The study also shows that cathodes with a LiNbO3 coating exhibit different charge transfer resistance trends after durability tests at various charging potentials. In addition, oxidation of sulfide at the solid electrolyte-coating interface was observed using time-of-flight secondary-ion mass spectrometry.

JOURNAL OF POWER SOURCES (2021)

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Article Chemistry, Physical

Bidirectionally Compatible Buffering Layer Enables Highly Stable and Conductive Interface for 4.5 V Sulfide-Based All-Solid-State Lithium Batteries

Longlong Wang et al.

Summary: A bidirectionally compatible buffering layer design scheme is proposed to overcome the interfacial challenges of sulfide-based HVASSLBs, leading to significantly enhanced performance in terms of initial discharge capacity, capacity retention, and rate performance.

ADVANCED ENERGY MATERIALS (2021)

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Review Electrochemistry

All-Solid-State Lithium Batteries with Sulfide Electrolytes and Oxide Cathodes

Jinghua Wu et al.

Summary: All-solid-state lithium batteries (ASSLBs) based on sulfide electrolytes and oxide cathodes have high safety and energy density, but face challenges such as stability of electrolytes, complex interfacial issues, and unstable electrode interfaces. Despite oxide cathodes being stable and industrialized, their compatibility with sulfide electrolytes presents a challenge for commercial use in ASSLBs.

ELECTROCHEMICAL ENERGY REVIEWS (2021)

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Article Chemistry, Physical

Li+ Transport Mechanism at the Heterogeneous Cathode/Solid Electrolyte Interface in an All-Solid-State Battery via the First-Principles Structure Prediction Scheme

Bo Gao et al.

CHEMISTRY OF MATERIALS (2020)

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Article Materials Science, Multidisciplinary

Acid-corrosion-formed amorphous phosphate surfaces improve electrochemical stability of LiNi0.80Co0.15Al0.05O2 cathodes

Shuangshuang Zhao et al.

CORROSION SCIENCE (2020)

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Article Electrochemistry

Ni-rich LiNi0.8Co0.1Mn0.1O2 coated with Li-ion conductive Li3PO4 as competitive cathodes for high-energy-density lithium ion batteries

Wenheng Zhang et al.

ELECTROCHIMICA ACTA (2020)

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Article Chemistry, Physical

Exothermal behavior and microstructure of a LiNi1/3Mn1/3Co1/3O2 electrode layer using a Li4SnS4 solid electrolyte

Hirofumi Tsukasaki et al.

JOURNAL OF POWER SOURCES (2020)

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A possible route towards dissipation-protected qubits using a multidimensional dark space and its symmetries

Raul A. Santos et al.

NATURE COMMUNICATIONS (2020)

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The Indium-Lithium Electrode in Solid-State Lithium-Ion Batteries: Phase Formation, Redox Potentials, and Interface Stability

A. L. Santhosha et al.

BATTERIES & SUPERCAPS (2019)

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Computational Screening of Cathode Coatings for Solid-State Batteries

Yihan Xiao et al.

JOULE (2019)

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Ionic conductivity and crystallization process in the Li2S-P2S5 glass electrolyte

Hirofumi Tsukasaki et al.

SOLID STATE IONICS (2018)

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Lithium Conductivity and Meyer-Neldel Rule in Li3PO4-Li3VO4-Li4GeO4 Lithium Superionic Conductors

Sokseiha Muy et al.

CHEMISTRY OF MATERIALS (2018)

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Review Chemistry, Physical

Sulfide solid electrolytes for all-solid-state lithium batteries: Structure, conductivity, stability and application

Shaojie Chen et al.

ENERGY STORAGE MATERIALS (2018)

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The Effects of Li/Nb Ratio on the Preparation and Photocatalytic Performance of Li-Nb-O Compounds

Haifa Zhai et al.

NANOSCALE RESEARCH LETTERS (2017)

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The Effects of Li/Nb Ratio on the Preparation and Photocatalytic Performance of Li-Nb-O Compounds

Haifa Zhai et al.

NANOSCALE RESEARCH LETTERS (2017)

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Are All-Solid-State Lithium-Ion Batteries Really Safe?-Verification by Differential Scanning Calorimetry with an All-Inclusive Microcell

Takao Inoue et al.

ACS APPLIED MATERIALS & INTERFACES (2017)

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Interface Stability in Solid-State Batteries

William D. Richards et al.

CHEMISTRY OF MATERIALS (2016)

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Insights on the fundamental lithium storage behavior of all-solid-state lithium batteries containing the LiNi0.8Co0.15Al0.05O2 cathode and sulfide electrolyte

Gang Peng et al.

JOURNAL OF POWER SOURCES (2016)

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Li+ conduction in Li-Nb-O films deposited by a sol-gel method

H. Niinomi et al.

SOLID STATE IONICS (2016)

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First principles study on electrochemical and chemical stability of solid electrolyte-electrode interfaces in all-solid-state Li-ion batteries

Yizhou Zhu et al.

JOURNAL OF MATERIALS CHEMISTRY A (2016)

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High-power all-solid-state batteries using sulfide superionic conductors

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NATURE ENERGY (2016)

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Origin of Outstanding Stability in the Lithium Solid Electrolyte Materials: Insights from Thermodynamic Analyses Based on First-Principles Calculations

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ACS APPLIED MATERIALS & INTERFACES (2015)

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Influence of the Li-Ge-P-S based solid electrolytes on NCA electrochemical performances in all-solid-state lithium batteries

Jingyun Yin et al.

SOLID STATE IONICS (2015)

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Space-Charge Layer Effect at Interface between Oxide Cathode and Sulfide Electrolyte in All-Solid-State Lithium-Ion Battery

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Li3PO4-Coated LiNi0.5Mn1.5O4: A Stable High-Voltage Cathode Material for Lithium-Ion Batteries

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CHEMISTRY-A EUROPEAN JOURNAL (2014)

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Effect of surface Li3PO4 coating on LiNi0.5Mn1.5O4 epitaxial thin film electrodes synthesized by pulsed laser deposition

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Dielectric Modification of 5V-Class Cathodes for High-Voltage All-Solid-State Lithium Batteries

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In situ electrochemical-mass spectroscopic investigation of solid electrolyte interphase formation on the surface of a carbon electrode

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Intefacial Observation between LiCoO2 Electrode and Li2S-P2S5 Solid Electrolytes of All-Solid-State Lithium Secondary Batteries Using Transmission Electron Microscopy

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The role of Li-ion battery electrolyte reactivity in performance decline and self-discharge

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Design of Cathode Coating Using Niobate and Phosphate Hybrid Material for Sulfide-Based Solid-State Battery

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