Electrochemically activated nickel-cobalt double hydroxide for aqueous ammonium-zinc hybrid battery  

作　　者：Qing Pan Peng Hei Yu Song Jianming Meng Chang Liu Xiao-Xia Liu 

机构地区：[1]Department of Chemistry,Northeastern University,Shenyang 110819,China [2]National Frontiers Science Center for Industrial Intelligence and Systems Optimization,Northeastern University,Shenyang 110819,China [3]Key Laboratory of Data Analytics and Optimization for Smart Industry(Northeastern University),Ministry of Education,Shenyang 110819,China

出　　处：《Nano Research》2023年第2期2495-2501,共7页纳米研究（英文版）

基　　金：the National Natural Science Foundation of China(No.51804066);the Fundamental Research Funds for the Central Universities(No.N2205003);X.X.L.acknowledges the support by the 111 Project(B16009);the financial support from LiaoNing Science and Technology Development Foundation Guided by Central Government(No.2021JH6/10500139).

摘　　要：Aqueous rechargeable ammonium-ion(NH^(4+))batteries(AAIBs)with ammonium ions as charge carriers possess many advantages,yet the relatively low discharge capacities(e.g.,<200 mAh·g^(−1))of the reported NH_(4)^(+)host materials hinder the development of AAIBs.Herein,we study the NH_(4)^(+)storage properties of an electrochemically activated NiCo double hydroxide(A-NiCo-DH)in neutral ammonium acetate electrolyte for the first time.The activation process extracts the interlayer anions(NO3from the host material,providing additional cation accommodation sites for charge storage.The introduced H vacancies in A-−)NiCo-DH could activate the O sites,leading to the enhanced cation adsorption capability for the electrode.Therefore,A-NiCo-DH exhibits a high discharge capacity of 280.6 mAh·g^(−1)at 0.72 A·g^(−1)with good rate capability.Spectroscopy studies suggest A-NiCo-DH experiences a NH4+/H+coinsertion mechanism.A NH4+-Zn hybrid cell is assembled using A-NiCo-DH as the cathode and Zn foil as the anode,respectively.The device delivers an energy density of 306 Wh·kg^(−1)at the power density of 745.8 W·kg^(−1)(based on the active mass of A-NiCo-DH).This work provides a new NH_(4)^(+)storage material and would push forward the development of aqueous NH4+-based batteries.

关 键 词：Ni-Co double hydroxide electrochemical activation charge storage mechanism high capacity ammonium-ion battery 

分 类 号：TM912[电气工程—电力电子与电力传动]