Graphene-Boosted, High-Performance Aqueous Zn-Ion Battery

Chao Shen; Xin Li; Nan Li; Keyu Xie; Jian-Gan Wang; Xingrui Liu; Bingqing Wei

doi:10.1021/acsami.8b07781

Graphene-Boosted, High-Performance Aqueous Zn-Ion Battery

ACS Appl Mater Interfaces. 2018 Aug 1;10(30):25446-25453. doi: 10.1021/acsami.8b07781. Epub 2018 Jul 19.

Authors

Chao Shen¹, Xin Li¹, Nan Li¹, Keyu Xie¹, Jian-Gan Wang¹, Xingrui Liu¹, Bingqing Wei^{1

2}

Affiliations

¹ State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering , Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU) , Xi'an 710072 , China.
² Department of Mechanical Engineering , University of Delaware , Newark DE19716 , United States.

PMID: 29979565
DOI: 10.1021/acsami.8b07781

Abstract

Given their low cost and eco-friendliness, rechargeable Zn-ion batteries (ZIBs) have received increasing attention as a device with great potential for large-scale energy storage. However, the development of ZIBs with high capacities and long lifespans is challenging because of the dendritic growth of Zn and the absence of suitable cathode materials. Herein, we report a novel rechargeable aqueous Zn-ion battery (AZIB) that consist of Zn coated with reduced graphene oxide as the anode and V₃O₇·H₂O/rGO composite as the cathode. The new AZIB exhibits excellent cycle stability with a high capacity retention of 79% after 1000 cycles. Moreover, it can deliver a high power density of 8400 W kg^-1 at 77 W h kg^-1 and a high energy density of 186 W h kg^-1 at 216 W kg^-1, and the former is higher than those of previously reported AZIBs. Our work provides a new perspective in developing rechargeable ZIBs and would greatly accelerate the practical applications of rechargeable ZIBs.

Keywords: V3O7·H2O/rGO; Zn-ion battery; Zn/rGO; dendrite-free; graphene.