Self-assembly of exfoliated layered double hydroxide and graphene nanosheets for electrochemical energy storage in zinc/nickel secondary batteries
Self-assembly of exfoliated layered double hydroxide and graphene nanosheets for electrochemical energy storage in zinc/nickel secondary batteries
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用于锌/镍二次电池电化学储能的剥离层状双氢氧化物和石墨烯纳米片的自组装
DOI：
10.1016/j.jpowsour.2017.05.060
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发表时间：
2017-08-15
影响因子：
9.2
通讯作者：
Zeng, Xiao
中科院分区：
文献类型：
--
作者：
Long, Jun;Yang, Zhanhong;Zeng, Xiao
本文对Zn-Al层状双氢氧化物（Zn-Al LDH）进行了剥离。采用室温离子交换法和化学剥离法合成了剥离型层状双氢氧化物/石墨烯复合物（剥离型LDH/G）。通过X射线衍射（XRD）、扫描电镜（SEM）和透射电镜（TEM）对复合材料进行表征，结果表明复合材料无明显杂质，形貌良好。本文对剥离型LDH/G电极和纯LDH电极在锌镍二次电池中的电化学性能进行了深入研究。结果表明，所制备的剥离型LDH/G电极具有良好的导电性和较低的自腐蚀性，具有较高的放电电压平台和较宽的放电电压平台，有利于电荷转移。初步结果表明，膨胀型LDH/G具有上级的锌镍二次电池性能，具有优异的可逆容量和优异的循环性能（1C下1200次循环后为343 mA h g（-1）），突出了自组装膨胀型LDH/G在锌镍二次电池中最大限度地利用膨胀型LDH的实用性。(C)2017爱思唯尔B. V.保留所有权利。
In this work, the Zn-Al layered double hydroxide (Zn-Al LDH) is exfoliated. Ambient temperature ion exchange and chemical exfoliation route have been developed to synthesize the exfoliated layered double hydroxide/graphene compounds (Exfoliated LDH/G). The as-prepared Exfoliated LDH/G nanocomposites demonstrate no obvious impurity and good morphology, being characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM). Here we intensively study the electrochemical performances of Exfoliated LDH/G and pure LDH electrodes for Zn-Ni secondary battery. It was found that the as-prepared Exfoliated LDH/G here exhibits higher and wide discharge voltage plateaus due to the well electrical conductivity and lower self-corrosion, which could promote charge-transfer of the exfoliated LDH. The preliminary results show that the Exfoliated LDH/G displays superior Zn-Ni secondary battery performance with outstanding reversible capacity, prominent cyclic performance (343 mA h g(-1) after 1200 cycles at 1 C), highlighting the practicability of the self-assembly Exfoliated LDH/G for maximum anodic utilization of exfoliated LDH for power storage in Zn-Ni secondary battery. (C) 2017 Elsevier B.V. All rights reserved.