Fluorinated Nanographite as a Cathode Material for Lithium Primary Batteries

被引：59

作者：

Wang, Li ^{[1
]}

Li, Yanyan ^{[1
]}

Wang, Shuo ^{[1
]}

Zhou, Pengfei ^{[1
]}

Zhao, Zengdian ^{[1
]}

Li, Xiaowei ^{[1
]}

Zhou, Jin ^{[1
]}

Zhuo, Shuping ^{[1
]}

机构：

[1] Shandong Univ Technol, Sch Chem & Chem Engn, Zibo, Peoples R China

来源：

CHEMELECTROCHEM | 2019年 / 6卷 / 08期

基金：

中国国家自然科学基金;

关键词：

lithium fluorocarbon batteries; fluorinated carbon; fluorinated nanographite; nanographite; cathode materials; HIGH-POWER; ELECTROCHEMICAL PERFORMANCE; GRAPHITE FLUORIDES; ELECTRODE MATERIAL; HIGH-ENERGY; MECHANISM; GRAPHENE; CFX; FLUOROGRAPHENE; INTERCALATION;

D O I：

10.1002/celc.201900194

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Lithium/fluorinated carbon (Li/CFx) batteries face the problems of low rate performance and initial voltage delay. Herein, we propose a novel type of fluorinated nanographite as a cathode material for Li/CFx batteries through the direct fluorination of nanographite. The structure of fluorinated nanographite, including crystalline phase, particle size, fluorine content, and the properties of C-F bonding, strongly depend on the fluorination temperature. The fluorinated nanographite prepared at 450 degrees C (FG-450) shows the highest specific capacity, 837.4 mAhg(-1) at 10 mAg(-1), along with a discharge plateau of 2.54 V, responding to an energy density of 2004.5 Whkg(-1). The highlights of the fluorinated nanographite are to deliver high rate performance and overcome the initial voltage delay. FG-450 can be discharged at a high rate of about 3.6 C, delivering a high power density of 5460 Wkg(-1) with a remaining energy density of 1030.5 Whkg(-1). The good electrochemical performance of the FG-450 sample is ascribed to the combined effect of its nanoparticle size, large specific surface area, and continuous stacking porosity.

引用

页码：2201 / 2207

页数：7

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