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(2023)
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Youchen Hao et al.
Summary: Sodium (Na) ion batteries (SIBs) show great potential for stationary energy storage applications. Current research is focused on finding suitable electroactive materials for SIBs, with phosphides being particularly appealing due to their high specific capacities and low working potentials. However, there are still challenges regarding their large volume variation and inferior interfacial stability, which affect capacity and cycling decay. This review provides an in-depth understanding of phosphides for Na storage, including their mechanism, capacity assessment, phase change, and reaction types. Effective strategies and designs for high-performance phosphides are discussed, along with the correlation between electrochemical behavior and chemical/structural characteristics. The knowledge gained from phosphide research can be shared and applied beyond phosphides.
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Yue Lian et al.
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Tian Jiang et al.
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Shaohua Shi et al.
Summary: A novel gradient carbon coating strategy was proposed to synthesize N-doped carbon coated TNO microspheres, which showed improved ionic diffusivity, electronic conductivity, and cycling stability. This ingenious structural design may provide a new direction for the construction of high-quality electrodes in LIBs.
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Hamed Aghamohammadi et al.
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Huaming Qian et al.
Summary: This review article provides a detailed overview of the recent progress in surface doping and bulk doping strategies for cathode materials in lithium-ion batteries. It discusses their effects on the structural stability, ion diffusion, and electrochemical properties of the materials. Furthermore, the article highlights the correlation between hybrid surface engineering strategies (doping and coating) and their impact on electrode performance, and identifies existing challenges and future prospects in this field.
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Jia Guo et al.
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Jia-Lin Yang et al.
Summary: The research aims to convert spent anode graphite into cathode material for dual-ion batteries through a two-step treatment, achieving comparable performance to commercial graphite with high reversible capacity and improved cycling performance, demonstrating significant environmental and economic benefits.
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Guohao Yang et al.
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Yue Wang et al.
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Simin Chai et al.
Summary: The development of low-cost and eco-friendly gel polymer electrolytes (GPEs) is crucial for safe and high-energy-density lithium-metal batteries. In this study, a biodegradable composite nanofiber membrane was synthesized and used as a skeleton for GPEs. The optimized GPEs showed excellent thermal stability, biodegradability, and liquid electrolyte absorbability, enabling stable operation in high voltage environments and high capacity retention.
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Yun Liu et al.
Summary: This study reveals that the adsorption behaviors of superoxide species can be effectively regulated via a core-induced interfacial charge interaction. Moderate adsorption strength can enable superior rate capability in a Li-O2 battery. Operando X-ray absorption near-edge structure and surface-enhanced Raman spectroscopy provide tools to monitor in situ the evolution of the superoxide intermediates and the electronic states of the catalyst's metal sites during the discharge and charge processes, and correlate these with the surface adsorption states. The concept of tuning adsorption behavior through interfacial charge engineering could open up new opportunities to further advance the development of the Li-O2 battery and beyond.
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Chemistry, Multidisciplinary
Wenxiu Hou et al.
Summary: This study investigates the application of Prussian blue analogues (PBAs) as electrode materials for aqueous ammonium ion batteries (AAIBs). A PANI/Na0.73Ni[Fe(CN)(6)](0.88) hybrid (PNFF) is synthesized using a covalent bond assisted engineering with in situ polyaniline (PANI) polymerization, combining the high conductivity of PANI and the stability of PBAs. It is found that the PANI content affects the electrochemical performance of PNFF, and an optimized PANI content results in enhanced reversible capacity and cycling stability. The ammonium storage mechanism of PNFF is investigated using in situ Raman and ex situ XPS/FTIR analysis, and a durable aqueous NH4+ full cell is assembled using a polyimide@MXene anode.
Review
Electrochemistry
Weixiao Wang et al.
Summary: This article systematically reviews recent progress in defect engineering for molybdenum-based electrode materials, including vacancy modulation, doping engineering, topochemical substitution, and amorphization. The essential optimization mechanisms of defect engineering in molybdenum-based electrode materials, as well as the existing challenges and future objectives for high-energy and high-power energy storage devices, are discussed.
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Zhifang Wang et al.
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Huanrui Zhang et al.
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Qiang Li et al.
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Oleg A. Drozhzhin et al.
Summary: Ti2Nb2O9 with a pseudo-2D layered morphology synthesized via ion exchange route exhibits a highly reversible capacity of 200 mAh g(-1) and shows a single-phase (de)lithiation mechanism with 4.8% unit cell volume change. Operando X-ray absorption near-edge structure (XANES) experiment reveals simultaneous Ti4+/Ti3+ and Nb5+/Nb4+ reduction/oxidation within the whole voltage range, showing great potential as a negative electrode material in high-performance LIBs.
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Jinfeng Zeng et al.
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