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alleviating the sluggish kinetics of all-solid-state batteries via cathode single-crystallization and multi-functional interface modification

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Journal of Energy Chemistry 2024年第11期98卷 123-133页

作者： Wen-Zhe liu Xin-Hai Meng Zi-Yi Zhou Qiang Zheng Ji-Lei Shi Yue Gong Yu-Guo Guo CAS Key Laboratory of Molecular Nanostructure and Nanotechnology Beijing National Laboratory for Molecular Sciences(BNLMS)Institute of ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China CAS Key Laboratory of Standardization and Measurement for Nanotechnology National Center for Nanoscience and TechnologyBeijing 100190China

The application of li-rich Mn-based cathodes, the most promising candidates for high-energy-density liion batteries, in all-solid-state batteries can further enhance the safety and stability of battery ***, the utilization of high-capacity li-rich cathodes has been limited by sluggish kinetics and severe interfacial issues in all-solid-state batteries. Here, a multi-functional interface modification strategy involving dispersed submicron single-crystal structure and multi-functional surface modification layer obtained through in-situ interfacial chemical reactions was designed to improve the electrochemical performance of li-rich Mn-based cathodes in all-solid-state batteries. The design of submicron single-crystal structure promotes the interface contact between the cathode particles and the solid-state electrolyte,and thus constructs a more complete ion and electron conductive network in the composite ***, the li-gradient layer and the lithium molybdate coating layer constructed on the surface of single-crystal li-rich particles accelerate the transport of li ions at the interface, suppress the side reactions between cathodes and electrolyte, and inhibit the oxygen release on the cathode surface. The optimized li-rich cathode materials exhibit excellent electrochemical performance in halide all-solid-state batteries. This study emphasizes the vital importance of reaction kinetics and interfacial stability of lirich cathodes in all-solid-state batteries and provides a facile modification strategy to enhance the electrochemical performance of all-solid-state batteries based on li-rich cathodes.

关键词： all-solid-state li-ion batteries li-rich Mn-based cathode materials Kinetics Interface Anion redox

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Pressure-Induced Pre-lithiation Enables High-Performing Si Anodes in all-solid-state batteries

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Energy & Environmental Materials 2024年第6期7卷 1-3页

作者： Weifei Hu Yuanyuan li Jinping liu School of Chemistry Chemical Engineering and Life Science and State Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhan 430070China School of Integrated Circuits Huazhong University of Science and TechnologyWuhan 430074China

A commentary on pressure-induced pre-lithiation towards Si anodes in allsolid-state li-ion batteries(ASSliBs)using sulfide electrolytes(SEs)is ***,feasible pre-lithiation technologies for Si anodes in SE-based ASSliBs especially the significant pressure-induced pre-lithiation strategies are briefly ***,a recent achievement by Meng et *** this field is elaborated in ***,the significance of Meng’s work is discussed.

关键词： all-solid-state li-ion batteries pre-lithiation pressure Si anode sulfide electrolyte

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