Amorphous GaN@Cu Freestanding Electrode for High-Performance Li-Ion Batteries
Amorphous GaN@Cu Freestanding Electrode for High-Performance Li-Ion Batteries
复制标题
用于高性能锂离子电池的非晶GaN@Cu独立式电极
DOI：
10.1002/adfm.201701808
复制
发表时间：
2017-09-20
影响因子：
19
通讯作者：
Li, Jinmin
中科院分区：
文献类型：
--
作者：
Ni, Shibing;Huang, Peng;Li, Jinmin
GaN首次被证明是锂离子电池（LIB）的理想阳极。采用低温脉冲激光沉积法制备了非晶GaN@Cu纳米棒（a-GaN@Cu）自支撑电极，该电极作为LIB的阳极具有优异的倍率性能和超长的使用寿命。采用多孔互连的金属纳米棒基底以改善结构完整性和电子导电性，a-GaN@Cu电极在0.25至6.25 A g（-1）的150次循环后提供980 mAh g（-1）的容量恢复，并且在10.0 A g（-1）的3000次循环后提供509 mAh g（-1）的高放电容量。系统研究了a-GaN中锂的存储，提出了氧化还原反应机理。
GaN is demonstrated to be an ideal anode for Li-ion batteries (LIBs) for the first time. Amorphous GaN@Cu nanorods (a-GaN@Cu) freestanding electrode is designed via a low-temperature pulsed laser deposition method, which exhibits prominent rate capability and untralong lifespan as an anode for LIBs. With porous interconnected metal nanorods substrate to improve the structure integrity and electronic conductivity, the a-GaN@Cu electrode delivers a capacity recovery of 980 mAh g(-1) after 150 cycles from 0.25 to 6.25 A g(-1) and a high discharge capacity of 509 mAh g(-1) after 3000 cycles at 10.0 A g(-1). The lithium storage in the a-GaN is also systematically studied, which suggests a redox reaction mechanism.