Janus Electrolyte with Modified Li~+ Solvation for High-Performance Solid-State Lithium Batteries

Yuzhen Hu; Linge Li; Haifeng TuXiaohong YiJian WangJingjing XuWenbin GongHongzhen LinXiaodong WuMeinan Liu

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Janus Electrolyte with Modified Li~+ Solvation for High-Performance Solid-State Lithium Batteries

机译：Janus Electrolyte with Modified Li~+ Solvation for High-Performance Solid-State Lithium Batteries

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Solid-state lithium-metal batteries attract great attention due to their high energy density and superior safety. However, the sluggish Li~+ kinetics of solid electrolyte and poor interface compatibility between electrolyte and lithium anode lead to unsatisfied performance at room temperature, which severely limit their practical application. Herein, a Janus quasi-solid electrolyte (JSE) design is reported, which modifies the Li~+ solvation environment in succinonitrile (SN) plastic crystal electrolyte and creates 1D Li~+ transportation channels. Density functional theory calculations and Raman results reveal that Li_(1.3)Al_(0.3)Ti_(1.7)(PO_4)_3 changes the Li~+ solvation environment from SN units to aggregated ion pairs, which accelerates the diffusion rate of Li~+. As a result, JSE presents excellent ionic conductivity (0.73 mS cm~(?1)) and high lithium transference number (0.72). With this efficient JSE, Li symmetric cells deliver excellent cycle stability over 600 h with a low over potential of 60 mV. LiFePO_4|JSE|Li solid-state battery delivers an impressive performance with a specific discharge capacity of 152 mAh g~(?1) after 100 cycles at room temperature under 0.5 C. Moreover, the corresponding pouch cell also shows outstanding performance (140 mAh g~(?1) under 0.5 C) and withstands abuse tests such as bending and cutting, demonstrating its superior safety for future utilization.

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来源
《Advanced functional materials》 |2022年第32期|2203336.1-2203336.9|共9页
作者
Yuzhen Hu; Linge Li; Haifeng TuXiaohong YiJian WangJingjing XuWenbin GongHongzhen LinXiaodong WuMeinan Liu;
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作者单位

School of Nano-Tech and Nano-Bionics University of Science and Technology of China Hefei, Anhui 230026, China,Key Laboratory of Multifunctional Nanomaterials and Smart Systems Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences Suzh;

Key Laboratory of Multifunctional Nanomaterials and Smart Systems Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences Suzhou, Jiangsu 215123, China;

Ji Hua Laboratory Foshan, Guangdong 528200, ChinaHelmholtz Institute Ulm (HIU) 89081 Ulm, GermanySchool of Nano-Tech and Nano-Bionics University of Science and Technology of China Hefei, Anhui 230026, ChinaSchool of Energy Xuzhou University of Technology Xuzhou 221018, China,Division of Nanomaterials and Jiangxi Key Lab of Carbonene Materials Jiangxi Institute of Nanotechnology Nanchang 330200, China;

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正文语种英语
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Janus quasi-solid electrolytes; solid-state lithium batteries; solvation structures;

Janus Electrolyte with Modified Li~+ Solvation for High-Performance Solid-State Lithium Batteries

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