Advanced rechargeable lithium-ion batteries based on bendable ZnCo2O4-urchins-on-carbon-fibers electrodes  

作　　者：Bin Liu Xianfu Wang Boyang Liu Qiufan Wang Dongsheng Tan Weifeng Song Xiaojuan Hou Di Chen Guozhen Shen 

机构地区：[1]State Key Laboratory of Supedattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China [2]Wuhan National Laboratory for Optoelectronics (WNLO) and College of Optical and Electronic Information, Huazhong University ofScience and Technology (HUST), Wuhan 430074, China

出　　处：《Nano Research》2013年第7期525-534,共10页纳米研究（英文版）

摘　　要：A novel class of ZnCo2O4-urchins-on-carbon-fibers matrix has been designed, characterized, and used to fabricate high-performance energy storage devices. We obtained a reversible lithium storage capacity of 1180 mA＇h/g even after 100 cycles, demonstrating the highreversible capacity and excellent cycle life of the as-prepared samples. Tested as fast-charging batteries, these electrodes exhibited a considerable capacity of 750 mA＇h/g at an exceptionally high rate of 20 C （18 A/g）, with an excellent cycle life （as long as 100 cycles）, which are the best high-rate results reported at such a high charge^discharge current density for ZnCo2O4-based anode materials in lithium rechargeable batteries. Such attractive properties may be attributed to the unique structure of the binder-free ZnCo2O4-urchins-on-carbon-fibers matrix. Full batteries were also developed by combining the ZnCo2O4 anodes with commercial LiCoO2 cathodes, which showed flexible/wearable and stable features for use as very promising future energy storage units.A novel class of ZnCo2O4-urchins-on-carbon-fibers matrix has been designed, characterized, and used to fabricate high-performance energy storage devices. We obtained a reversible lithium storage capacity of 1180 mA＇h/g even after 100 cycles, demonstrating the highreversible capacity and excellent cycle life of the as-prepared samples. Tested as fast-charging batteries, these electrodes exhibited a considerable capacity of 750 mA＇h/g at an exceptionally high rate of 20 C （18 A/g）, with an excellent cycle life （as long as 100 cycles）, which are the best high-rate results reported at such a high charge^discharge current density for ZnCo2O4-based anode materials in lithium rechargeable batteries. Such attractive properties may be attributed to the unique structure of the binder-free ZnCo2O4-urchins-on-carbon-fibers matrix. Full batteries were also developed by combining the ZnCo2O4 anodes with commercial LiCoO2 cathodes, which showed flexible/wearable and stable features for use as very promising future energy storage units.

关 键 词：ZnCo2O4-urchins-on- carbon-fibers advanced lithium-ion batteries flexible/wearable features 

分 类 号：TM912[电气工程—电力电子与电力传动] O657.1[理学—分析化学]