Inorganic Filler Enhanced Formation of Stable Inorganic-Rich Solid Electrolyte Interphase for High Performance Lithium Metal Batteries

Chi Guo; Kang Du; Runming TaoYaqing GuoShuhao YaoJianxing WangDeyu WangJiyuan LiangShih-Yuan Lu

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Inorganic Filler Enhanced Formation of Stable Inorganic-Rich Solid Electrolyte Interphase for High Performance Lithium Metal Batteries

机译：Inorganic Filler Enhanced Formation of Stable Inorganic-Rich Solid Electrolyte Interphase for High Performance Lithium Metal Batteries

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Lithium metal (LM) is a promising anode material for next generation lithiumion based electrochemical energy storage devices. Critical issues of unstablesolid electrolyte interphases (SEIs) and dendrite growth however still impedeits practical applications. Herein, a composite gel polymer electrolyte (GPE),formed through in situ polymerization of pentaerythritol tetraacrylate withfumed silica fillers, is developed to achieve high performance lithium metalbatteries (LMBs). As evidenced theoretically and experimentally, the presenceof SiO_2 not only accelerates Li~+ transport but also regulates Li~+ solvationsheath structures, thus facilitating fast kinetics and formation of stable LiFrichinterphase and achieving uniform Li depositions to suppress Li dendritegrowth. The composite GPE-based Li‖ Cu half-cells and Li‖ Li symmetrical cellsdisplay high Coulombic efficiency (CE) of 90.3% after 450 cycles and maintainstability over 960 h at 3 mA cm~(?2) and 3 mAh cm~(?2), respectively. In addition,Li‖ LiFePO_4 full-cells with a LM anode of limited Li supply of 4 mAh cm~(?2)achieve capacity retention of 68.5% after 700 cycles at 0.5 C (1 C = 170 mA g~(?2)).Especially, when further applied in anode-free LMBs, the carbon cloth‖ LiFePO_4full-cell exhibits excellent cycling stability with an average CE of 99.94% andcapacity retention of 90.3% at the 160th cycle at 0.5 C.

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《Advanced functional materials》 |2023年第29期|2301111.1-2301111.13|共13页
作者
Chi Guo; Kang Du; Runming TaoYaqing GuoShuhao YaoJianxing WangDeyu WangJiyuan LiangShih-Yuan Lu;
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Key Laboratory of Optoelectronic Chemical Materials and Devicesof Ministry of EducationJianghan UniversityWuhan 430056, China;

Key Laboratory of Optoelectronic Chemical Materials and Devicesof Ministry of EducationJianghan UniversityWuhan 430056, China;

Department of ChemistryInstitute for Advanced Materials and ManufacturingThe University of TennesseeKnoxville TN 37996, USA;

Department of Chemical EngineeringNational Tsing Hua UniversityHsinchu 30013, TaiwanState Key Laboratory of Advanced Electromagnetic Engineeringand TechnologyHuazhong University of Science and TechnologyWuhan 430074, ChinaDepartment of ChemistryInstitute for Advanced Materials and ManufacturingThe University of TennesseeKnoxville TN 37996, USA;

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cathode electrolyte interphase; composite gel electrolytes; interfacial stability; lithium metal batteries; solvation structures; solid electrolyte interphases;

Inorganic Filler Enhanced Formation of Stable Inorganic-Rich Solid Electrolyte Interphase for High Performance Lithium Metal Batteries

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