Heterogeneous Nitride Interface Enabled by Stepwise-Reduction Electrolyte Design for Dense Li Deposition in Carbonate Electrolytes

Zhenglu Zhu; Zhikang Liu; Ruirui ZhaoXiaoqun QiJie JiFengyi YangLong QieYunhui Huang

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Heterogeneous Nitride Interface Enabled by Stepwise-Reduction Electrolyte Design for Dense Li Deposition in Carbonate Electrolytes

机译：Heterogeneous Nitride Interface Enabled by Stepwise-Reduction Electrolyte Design for Dense Li Deposition in Carbonate Electrolytes

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Stable solid electrolyte interphase (SEI) with high Li+-ion conductivity is desperately desired for lithium (Li) metal anodes. However, it remains challenging to build a robust SEI rationally for the Li-metal anodes in carbonate electrolytes. Herein, a heterogeneous nitride-rich SEI that consists of organic nitrides on the surface and inorganic nitrides inside by stepwise-reduction electrolyte design is constructed. The heterogeneous structure endows SEI with the capability to capture and distribute Li+ on the surface and facilitate internal Li~+ transportation, leading to the redistributed Li~+ flux and uniform Li electrodeposition. With the newly-formulated carbonate electrolyte, Li‖Cu cells deliver a high Coulombic efficiency of 98.0% after 300 cycles at 0.5 mA cm~(-2) and 0.5 mAh cm~(-2). Meanwhile, superb cycling stability is also determined with full Li-metal cells using LiNi_(1/3)Mn_(1/3)Co_(1/3)O_2 and high-loading LiFePO_4 (12.0 mg cm~(?2)) cathodes. This study provides a promising strategy to regulate the SEI components and stabilize the Li anodes by rational electrolyte design.

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《Advanced functional materials》 |2022年第48期|2209384.1-2209384.8|共8页
作者
Zhenglu Zhu; Zhikang Liu; Ruirui ZhaoXiaoqun QiJie JiFengyi YangLong QieYunhui Huang;
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State Key Laboratory of Material Processing and Die & Mold Technology School of Materials Science and Engineering Huazhong University of Science and Technology Wuhan, Hubei 430074, China;

Institute of New Energy for Vehicles School of Materials Science and Engineering Tongji University Shanghai 201804, China;

Institute of New Energy for Vehicles School of Materials Science and Engineering Tongji University Shanghai 201804, China,State Key Laboratory of Material Processing and Die & Mold Technology School of Materials Science and Engineering Huazhong University;

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正文语种英语
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carbonate electrolytes; Heterogeneous SEIs; Li dendrites; nitride interfaces; stepwise reduction;

Heterogeneous Nitride Interface Enabled by Stepwise-Reduction Electrolyte Design for Dense Li Deposition in Carbonate Electrolytes

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