Feng Jingjing, Fu Bowen, Fang Liang, Wang Fang, Zhang Xin, Li Yongtao, Song Yun
School of Materials Science and Engineering & Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials of Ministry of Education, Anhui University of Technology Maanshan 243002 China
Department of Materials Science, Fudan University Shanghai 200433 China
RSC Adv. 2019 Oct 29;9(60):34896-34901. doi: 10.1039/c9ra07064h. eCollection 2019 Oct 28.
Exploration of a novel metal oxyhydroxide material provides potential candidates for lithium ion battery (LIB) anodes. In the present work, uniform GaOOH nanorods have been successfully synthesized a simple hydrothermal method and employed as an anode material for LIBs for the first time. The obtained GaOOH nanorods show a high-purity phase with an average length of ∼1.4 μm and a width of ∼100 nm. As an anode, it delivers a stable capacity of ∼1089 mA h g at a 0.5 A g current density upon 300 cycles and a high rate capacity of ∼639 mA h g at 2 A g, where the pseudocapacitance plays a dominant role with a capacity contribution ratio of about 83% at 2.0 mV s. This enhanced storage performance can be attributed to a 1D nanostructure with efficient electron and ion transfer as well as strain relaxation upon multiple-cycling.
对一种新型金属氢氧化物材料的探索为锂离子电池（LIB）阳极提供了潜在的候选材料。在本工作中，通过一种简单的水热法成功合成了均匀的GaOOH纳米棒，并首次将其用作LIBs的阳极材料。所获得的GaOOH纳米棒呈现出高纯度相，平均长度约为1.4μm，宽度约为100nm。作为阳极，在0.5A g的电流密度下经过300次循环后，它能提供约1089 mA h g的稳定容量，在2A g时具有约639 mA h g的高倍率容量，其中赝电容起主导作用，在2.0 mV s时容量贡献比约为83%。这种增强的存储性能可归因于具有高效电子和离子传输以及多次循环时应变弛豫作用的一维纳米结构。
