A Metal-Organic Compound as Cathode Material with Superhigh Capacity Achieved by Reversible Cationic and Anionic Redox Chemistry for High-Energy Sodium-Ion Batteries

被引：133

作者：

Fang, Chun ^{[1
]}

Huang, Ying ^{[2
]}

Yuan, Lixia ^{[1
]}

Liu, Yaojun ^{[1
]}

Chen, Weilun ^{[1
]}

Huang, Yangyang ^{[1
]}

Chen, Kongyao ^{[1
]}

Han, Jiantao ^{[1
]}

Liu, Qingju ^{[2
]}

Huang, Yunhui ^{[1
,3
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China

[2] Yunnan Univ, Sch Mat Sci & Engn, Kunming 650091, Yunnan, Peoples R China

[3] Dongguan McNair New Power Co Ltd, Dongguan 523800, Guangdong, Peoples R China

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2017年 / 56卷 / 24期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

cathode materials; electron transfer; metalorganic compounds; redox chemistry; UV/Vis spectroscopy; LITHIUM BATTERY; SALTS; TCNQ;

D O I：

10.1002/anie.201701213

中图分类号：

O6 [化学];

学科分类号：

070301 [无机化学];

摘要：

Although sodium-ion batteries (SIBs) are considered as alternatives to lithium-ion batteries (LIBs), the electrochemical performances, in particular the energy density, are much lower than LIBs. A metal-organic compound, cuprous 7,7,8,8-tetracyanoquinodimethane (CuTCNQ), is presented as a new kind of cathode material for SIBs. It consists of both cationic (Cu-II <-> Cu-I) and anionic (TCNQ(0)<-> TCNQ(-)<-> TCNQ(2-)) reversible redox reactions, delivering a discharge capacity as high as 255 mAhg(-1) at a current density of 20 mAg(-1). The synergistic effect of both redox-active metal cations and organic anions brings an electrochemical transfer of multiple electrons. The transformation of cupric ions to cuprous ions occurs at near 3.80 V vs. Na+/Na, while the full reduction of TCNQ(0) to TCNQ(-) happens at 3.00-3.30 V. The remarkably high voltage is attributed to the strong inductive effect of the four cyano groups.

引用

页码：6793 / 6797

页数：5

共 27 条

[1]

Single Electron Transfer-Driven Multi-Dimensional Signal Read-out Function of TCNQ as an "Off-the-Shelf" Detector for Cyanide [J].