Open AccessBismuth Oxide Selenium/Graphene Oxide Composites: Toward High‐Performance Electrodes for Aqueous Alkaline Battery
Author(s) -
Liu YiLin,
Li MengQiu,
Wang GuiGen,
Dang LeYang,
Li Fei,
Pam Mei Er,
Zhang HuaYu,
Han JieCai,
Yang Hui Ying
Publication year - 2021
Publication title -
energy and environmental materials
Language(s) - English
Resource type - Journals
ISSN - 2575-0356
DOI - 10.1002/eem2.12130
Subject(s) - anode , materials science , nanosheet , oxide , graphene , battery (electricity) , bismuth , power density , electrode , aqueous solution , cathode , chemical engineering , energy storage , alkaline battery , current density , composite material , nanotechnology , metallurgy , chemistry , electrolyte , power (physics) , organic chemistry , physics , quantum mechanics , engineering
Aqueous alkaline battery represents a promising energy storage technology with both high energy density and high power density as rechargeable batteries. However, the low theoretical capacities, kinetics and stability of anode materials have limited their developments and commercializations. In this study, we propose a novel method to produce two‐dimensional layered bismuth oxide selenium (Bi 2 O 2 Se) and reduced graphene oxide (rGO) composites via a one‐step hydrothermal method. The volume change caused by phase change during rapid charging and discharging is significantly reduced and the capacity reaches 263.83 mAh g −1 at a current density of 0.5 A g −1 . The Bi 2 O 2 Se/rGO electrode exhibits excellent cycling stability in which the capacity retention rate is 81.04% after 5000 cycles. More importantly, the Bi 2 O 2 Se/rGO nanosheet composite is used as the anode electrode material with MnCo 2 O 4.5 @Ni(OH) 2 as the cathode electrode material in aqueous alkaline battery. When the energy density is 76.16 W h kg −1 , the power density reaches 308.65 W kg −1 . At a power density of 10.21 kW kg −1 , the energy density remains as high as 33.86 W h kg −1 . The results presented here may advance the understanding of the issues facing the development of aqueous battery anode materials.