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Article
Chemistry, Multidisciplinary
Zhongsheng Wang et al.
Summary: Tailoring the inorganic components of the CEI and SEI in lithium metal batteries is crucial for improving their cycling performance. By using PFBNBS as an electrolyte additive guided by functional groups, the species and inorganic content of the CEI/SEI are enriched with a gradient distribution. Furthermore, the catalytic effect of the NCM622 cathode on the decomposition of PFBNBS is proposed. This tailored electrolyte enables the formation of an inorganic-rich CEI on NCM622 and an increased inorganic content in the SEI, leading to superior electrochemical performance and inhibiting electrolyte decomposition.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Gaoxue Jiang et al.
Summary: This study proposes a novel electrolyte additive to optimize the electrode electrolyte interface and address the issues caused by high voltage. The additive can form a dense and stable solid electrolyte interphase, suppress the growth of lithium dendrites, and enhance lithium ion transport efficiency. Additionally, it can protect the electrolyte interface from corrosion. Experimental results demonstrate that lithium batteries using this electrolyte exhibit improved cycling life and energy density under high voltage.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Lifeng Wang et al.
Summary: A stable solid electrolyte interphase (SEI) composition, sodium bromide (NaBr), was predicted to suppress Na dendrite growth. The use of 1,2-dibromobenzene (1,2-DBB) additive in the electrolyte resulted in a desirable NaBr-rich stable SEI layer. The Na||Na3V2(PO4)(3) cell with the electrolyte containing 1,2-DBB achieved an extraordinary capacity retention of 94% after 2000 cycles at a high rate of 10 C. This study provides a design philosophy for dendrite-free Na metal anode and can be expanded to other metal anodes.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Jiaxun Zhang et al.
Summary: By forming a robust cathode electrolyte interphase, the researchers have successfully addressed the structural instability and capacity fading issue of single-crystalline LiCoO2 electrodes at high voltages, providing new insights for improved electrolyte design of battery cathode materials with high energy density.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Jin Li et al.
Summary: Calcium-ion batteries (CIBs) have great potential for energy storage applications due to the abundance, low redox potential, and multivalent properties of calcium (Ca). However, the lack of suitable electrolytes and electrode materials has restricted the cycling stability and capacity of CIBs. In this study, a concentrated electrolyte with a calcium bis(fluorosulfonyl)imide (Ca(FSI)(2)) salt dissolved in carbonate solvents was developed, which significantly improved the intercalation capacity for anions in the graphite cathode and the reversible insertion of Ca2+ in the organic anode. By combining this electrolyte with low-cost graphite cathode and organic anode, a Ca-based dual-ion battery (Ca-DIB) with high specific discharge capacity and good capacity retention was achieved.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Friederike Reissig et al.
Summary: Ni-rich layered oxide cathodes are promising for automotive lithium-ion batteries, with stability issues addressed through doping and coating strategies. Research shows that Zr4+ doping can improve electrochemical performance, emphasizing the interactions between doping and coating.
Article
Chemistry, Multidisciplinary
Wengao Zhao et al.
Summary: Lithium-ion batteries based on single-crystal LiNi1-x-yCoxMnyO2 (NCM, 1-x-y >= 0.6) cathode materials have gained attention for their improved structural stability and longer cycle life compared to polycrystalline NCM batteries. This study conducted a detailed postmortem analysis, comparing the performance of pouch cells with single-crystal and polycrystalline LiNi0.60Co0.20Mn0.20O2 (NCM622) cathodes after 1375 charge-discharge cycles against graphite anodes. The findings reveal that single-crystal particles have reduced cracking and transition metal dissolution compared to polycrystalline particles, leading to superior performance in terms of capacity retention and cycle life.
Article
Chemistry, Multidisciplinary
Zhicheng Wang et al.
Summary: This study successfully addresses the limitations of commercial carbonate electrolytes by fabricating a novel ultralow-concentration electrolyte with low cost, non-flammability, wide temperature operation window, and high electrochemical window. It also suppresses Li dendrite growth. The Li metal battery using this electrolyte shows outstanding performance under high voltage and wide temperature range.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Panxing Bai et al.
Summary: The capacity of Li-ion battery cathodes can be improved by increasing the charging potential, but this often leads to fast capacity decay. In this study, a LiF-rich CEI was formed to enhance the structural integrity of the cathode and suppress electrolyte penetration. The LiCoO2 cathode with LiF-rich CEI showed improved capacity retention and longer cycle life compared to the LiF-free LiCoO2 cathode.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Xudong Peng et al.
Summary: The emerging localized high-concentration electrolytes (LHCEs) with small salt dosage, low viscosity, and favorable electrode wettability have triggered extensive research interest recently. In this study, an anode-compatible and high-voltage ether-based LHCE (BTF-LHCE) is proposed by introducing cost-efficient and lightweight benzotrifluoride (BTF) as a diluent. The BTF-LHCE system exhibits unique solvation structure and interfacial chemistry, leading to high Coulombic efficiency (CE) for both Si and metallic Li anodes. The Si||NCM622 and Li||NCM622 pouch cell assembled with BTF-LHCE show high cell-level specific energy densities, indicating the promising potential of the advanced ether-based electrolytes for high-voltage and high-specific-energy battery technologies.
Article
Energy & Fuels
Sha Tan et al.
Summary: Stable cycling at an ultra-high voltage of 4.8 V can be achieved by adding an appropriate amount of lithium difluorophosphate in a common commercial electrolyte. The robust interphase formed on the cathode plays a key role in suppressing transition metal dissolution and facilitating uniform lithium distribution.
Review
Chemistry, Physical
Joe C. Stallard et al.
Summary: This review focuses on the measurement of mechanical properties of LIB cathode materials and discusses the factors that influence their performance. It provides a comprehensive analysis of the relationship between mechanical degradation and electrochemical performance.
Article
Chemistry, Physical
Saehun Kim et al.
Summary: The advancement of electrolyte systems has facilitated the development of high-performance Li metal batteries by creating robust electrode-electrolyte interfaces, which address the challenges of dendritic Li growth and irreversible Li plating/stripping. The application of specific electrode-electrolyte interface modifiers, LiNO3 and LiDFBP, have demonstrated improved cycle life and Coulombic efficiency for Li|NCM811 full cells.
ENERGY STORAGE MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Chunlei Jiang et al.
Summary: Aluminum is a promising anode material for lithium-ion batteries due to its high theoretical capacity, excellent conductivity, and natural abundance. However, the insulating oxide surface layer and poor electrolyte wettability limit its capacity utilization and hinder reaction kinetics. Surface grafting of polar amino groups is an effective strategy to improve these issues. This study reveals the critical limitations and underlying mechanisms of the aluminum anode and provides insights for other metallic anodes with similar issues.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Review
Chemistry, Multidisciplinary
Manqi Peng et al.
Summary: Alloy-type anodes have high theoretical capacity but face challenges such as volume expansion and fragility. This review summarizes recent progress in the research of batteries based on alloy-type anodes and highlights improvements in structural design, protective interface, and electrolyte selection as effective means to enhance their performance.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Junxiang Liu et al.
Summary: This study reveals that the compositions of cathode electrolyte interphases (CEIs) are mainly controlled by abundant species in the inner Helmholtz layer (IHL), and the properties of CEIs can be modulated by adding coating materials, thus improving the cycling stability of batteries.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Tianju Fan et al.
Summary: LiCoO2 (LCO) is a widely studied cathode material for Li-ion batteries, but its charging to high potentials leads to rapid degradation. In this study, the authors propose a surface coating method using RbAlF4 modified LCO particles. The coated LCO cathodes demonstrate enhanced capacity and impressive retention, and the main reason for the degradation of high voltage cells is found to be the instability of the anode side rather than the failure of the coated cathodes.
Article
Chemistry, Multidisciplinary
Xudong Peng et al.
Summary: This study proposes a solvent molecule reconstruction strategy to construct a localized middle-concentration electrolyte with high Li compatibility and high voltage resistance. By controlling the polymerization process, unstable free solvent molecules can be scavenged and reconstructed to form polyethers with higher oxidation resistance. The scavenging and reconstruction also induce the generation of more favorable solvation configurations, effectively protecting the anode and cathode. The lithium metal battery equipped with this electrolyte exhibits stable cycling performance and high energy density.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Physical
Mingming Fang et al.
Summary: This study reports an electrolyte design for high-voltage lithium metal batteries, which achieves stable operation and high capacity retention by constructing a thin yet robust inorganic-organic interlocking protective film.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Multidisciplinary
Fang Li et al.
Summary: This study focuses on the impact of bisfluoroacetamide (BFA) as an electrolyte additive on the solid electrolyte interphase (SEI) structure. By constructing a gradient SEI structure, it achieves better Li ion capture and transportation effects.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Zhipeng Wen et al.
Summary: The use of lithium 2 trifluoromethyl-4,5-dicyanoimidazolide (C6F3LiN4) as an electrolyte additive in lithium metal-based batteries helps in forming protective films on both electrodes. It effectively protects the cathode from deterioration and prevents the formation of lithium dendrites on the anode, leading to stable cycling performance and high capacity retention after multiple cycles.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Multidisciplinary
Jia-Yan Liang et al.
Summary: The study proposes a dual-interface protection strategy which effectively combines solid-state and liquid-state batteries, addressing main challenges while maintaining energy density.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Review
Chemistry, Physical
Ming Jiang et al.
Summary: The demand for sustainable energy storage has led to a need for rechargeable lithium-ion batteries with higher specific capacity and safety standards, which has put Ni-rich layered transition metal oxides in the spotlight. While these materials show promise for the next generation of batteries, their instability poses challenges for commercialization. This paper reviews degradation processes in Ni-rich cathode-based LIBs and discusses recent advancements in stabilization strategies for future battery components.
ADVANCED ENERGY MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Xin Li et al.
Summary: The study focuses on designing a gradient lithium oxysulfide/uniform lithium fluoride-type SEI using HFPTf as an electrolyte additive, which improves the cycling stability of Li-ion batteries and inhibits the growth of Li dendrites. Additionally, the formation of a uniform and stable CEI on the cathode surface with HFPTf-containing electrolyte enhances capacity retention in Li||NCM811 batteries.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Zhongzhong Li et al.
Summary: This study presents a method of coating a PP separator with a layer of ultrastrong DLC to suppress Li-dendrite growth, which undergoes in situ chemical lithiation when assembled with the lithium-metal anode, resulting in stable cycling and dendrite-free lithium deposition.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Physical
Binayak Roy et al.
Summary: A new class of Li salts with improved electrochemical performance, including higher oxidative stability and good stability towards aluminum substrates, has been introduced in this study. Testing with high voltage NMC811 and LMO cathodes showed stable cycling performance, with the LMO|Li cell maintaining a low capacity fade rate even after exposure to atmospheric conditions for 24 hours.
ADVANCED ENERGY MATERIALS
(2021)
Review
Chemistry, Multidisciplinary
Xiulin Fan et al.
Summary: The energy density of LIBs has been increased threefold since their introduction, but the capacity of transition metal oxide cathodes is approaching its limit due to stability limitations of electrolytes. To further enhance energy density, new high-capacity and high-voltage cathode materials need to be explored, and graphite anodes may need to be replaced. One of the main challenges for future development is the development of new electrolyte compositions that can accommodate high-voltage cathodes and anodes while ensuring the stability of the batteries.
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PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2015)
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NATURE COMMUNICATIONS
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NATURE COMMUNICATIONS
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FLUID PHASE EQUILIBRIA
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