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作 者:Jiawei Gao Xuesong Xie Shuquan Liang Bingan Lu Jiang Zhou
机构地区:[1]School of Materials Science and Engineering,Central South University,Changsha 410083,People’s Republic of China [2]School of Physics and Electronics,Hunan University,Changsha 410082,People’s Republic of China [3]Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province,Central South University,Changsha 410083,People’s Republic of China
出 处:《Nano-Micro Letters》2021年第4期247-258,共12页纳微快报(英文版)
基 金:National Natural Science Foundation of China(Grant Nos.51972346,51932011,51922038,and 51672078);Hunan Outstanding Youth Talents(No.2019JJ20005);the Program of Youth Talent Support for Hunan Province(2020RC3011);Innovation-Driven Project of Central South University(No.2020CX024).
摘 要:Zinc-ion batteries(ZIBs)is a promising electrical energy storage candidate due to its eco-friendliness,low cost,and intrinsic safety,but on the cathode the element dissolution and the formation of irreversible products,and on the anode the growth of dendrite as well as irreversible products hinder its practical application.Herein,we propose a new type of the inorganic highly concentrated colloidal electrolytes(HCCE)for ZIBs promoting simultaneous robust protection of both cathode/anode leading to an effective suppression of element dissolution,dendrite,and irreversible products growth.The new HCCE has high Zn^(2+)ion transference number(0.64)endowed by the limitation of SO4^(2−),the competitive ion conductivity(1.1×10^(–2) S cm^(−1))and Zn2+ion diffusion enabled by the uniform pore distribution(3.6 nm)and the limited free water.The Zn/HCCE/α-MnO2 cells exhibit high durability under both high and low current densities,which is almost 100%capacity retention at 200 mA g^(−1) after 400 cycles(290 mAh g^(−1))and 89%capacity retention under 500 mA g^(−1) after 1000 cycles(212 mAh g^(−1)).Considering material sustainability and batteries’high performances,the colloidal electrolyte may provide a feasible substitute beyond the liquid and all-solid-state electrolyte of ZIBs.
关 键 词:Zn-ion battery PALYGORSKITE INORGANIC Colloidal electrolyte Cycle stability
分 类 号:TM912[电气工程—电力电子与电力传动] O648.1[理学—物理化学]
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