"Tai Chi" philosophy driven rigid-flexible hybrid ionogel electrolyte for high-performance lithium battery

被引：88

作者：

Chen, Nan ^{[1
,2
]}

Xing, Yi ^{[2
]}

Wang, Lili ^{[1
]}

Liu, Fan ^{[1
]}

Li, Li ^{[1
,3
]}

Chen, Renjie ^{[1
,2
]}

Wu, Feng ^{[1
,3
]}

Guo, Shaojun ^{[2
,4
,5
,6
]}

机构：

[1] Beijing Inst Technol, Beijing Key Lab Environm Sci & Engn, Sch Mat Sci & Engn, Beijing 100081, Peoples R China

[2] Peking Univ, Coll Engn, Dept Mat Sci & Engn, Beijing 100871, Peoples R China

[3] Collaborat Innovat Ctr Elect Vehicles Beijing, Beijing 100081, Peoples R China

[4] Peking Univ, Coll Engn, BIC ESAT, Beijing 100871, Peoples R China

[5] Peking Univ, Beijing Key Lab Magnetoelect Mat & Devices BKL ME, Beijing 100871, Peoples R China

[6] Peking Univ, Coll Engn, Dept Energy & Resources Engn, Beijing 100871, Peoples R China

来源：

NANO ENERGY | 2018年 / 47卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Solid-state electrolyte; Ionogel; Ionic liquid; Li metal battery; Tai Chi; LI-ION BATTERIES; POLYMER ELECTROLYTES; METAL ANODE; LIQUID ELECTROLYTES; DENDRITE GROWTH; GRAPHENE OXIDE; HIGH-VOLTAGE; COMPOSITE; GEL; NANOCOMPOSITES;

D O I：

10.1016/j.nanoen.2018.02.036

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

Dendritic growth of Li metal and its related safety issue in a liquid electrolyte greatly hinder the development of Li metal batteries. Herein, inspired by the Tai Chi philosophy of keeping rigid and flexible balance, we demonstrate a new rigid-flexible hybrid ionogel electrolyte composed of TiO2 rigid framework, PVDF-HFP flexible framework and LiTFSI-Py13TFSI ionic liquid for greatly boosting the performance of Li battery. The as-made hybrid ionogel electrolyte not only has excellent electrochemical properties, such as ionic conductivity up to 7.4x10(-3) S/cm at 25 degrees C and anodic stability up to 5.5 V versus Li/Li+, but also has a high mechanical strength to withstand extrusion. These important features make it be able to realize the stable stripping/plating of Li anodes. The hybrid ionogel electrolyte enables the assembled LiFePO4/Li batteries to be successfully cycled at wide C rate (0.1-2.0 C) and exhibit no significant capacity degradation for up to 500 days (about 600 cycles) at a 0.1 C rate. The design from Tai Chi philosophy to protect Li metal opens new opportunities to realize high energy-density Li metal batteries.

引用

页码：35 / 42

页数：8

共 46 条

[1]

Dispersibility of nano-TiO2 on performance of composite polymer electrolytes for Li-ion batteries [J].