Synergistic Dual-Additive Electrolyte Enables Practical Lithium-Metal Batteries

被引：325

作者：

Li, Siyuan ^{[1
]}

Zhang, Weidong ^{[1
]}

Wu, Qiang ^{[2
]}

Fan, Lei ^{[1
]}

Wang, Xinyang ^{[1
]}

Wang, Xiao ^{[1
]}

Shen, Zeyu ^{[1
]}

He, Yi ^{[2
]}

Lu, Yingying ^{[1
]}

机构：

[1] Zhejiang Univ, Inst Pharmaceut Engn, Coll Chem & Biol Engn, Hangzhou 310027, Peoples R China

[2] Zhejiang Univ, Coll Chem & Biol Engn, Hangzhou 310027, Peoples R China

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2020年 / 59卷 / 35期

基金：

国家重点研发计划;

关键词：

batteries; electrochemistry; interfaces; lithium; surface analysis; POUCH CELLS; ANODE; INTERFACES;

D O I：

10.1002/anie.202004853

中图分类号：

O6 [化学];

学科分类号：

070301 [无机化学];

摘要：

A rechargeable Li metal anode coupled with a high-voltage cathode is a promising approach to high-energy-density batteries exceeding 300 Wh kg(-1). Reported here is an advanced dual-additive electrolyte containing a unique solvation structure and it comprises a tris(pentafluorophenyl)borane additive and LiNO3 in a carbonate-based electrolyte. This system generates a robust outer Li2O solid electrolyte interface and F- and B-containing conformal cathode electrolyte interphase. The resulting stable ion transport kinetics enables excellent cycling of Li/LiNi0.8Mn0.1Co0.1O2 for 140 cycles with 80 % capacity retention under highly challenging conditions (approximate to 295.1 Wh kg(-1) at cell-level). The electrolyte also exhibits high cycling stability for a 4.6 V LiCoO2 (160 cycles with 89.8 % capacity retention) cathode and 4.95 V LiNi0.5Mn1.5O4 cathode.

引用

页码：14935 / 14941

页数：7

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