The modulation of the discharge plateau of benzoquinone for sodium-ion batteries  

作　　者：Feng-hua Chen Yi-wen Wu Huan-hong Zhang Zhan-tu Long Xiao-xin Lin Ming-zhe Chen Qing Chen Yi-fan Luo Shu-Lei Chou Rong-hua Zeng 

机构地区：[1]Key Laboratory of Theoretical Chemistry of the Environment,Ministry of Education,School of Chemistry,South China Normal University,Guangzhou 510006,China [2]Institute for Superconducting and Electronic Materials,Australian Institute for Innovative Materials,University of Wollongong,Innovation Campus,Squires Way,North Wollongong,NSW 2522,Australia [3]Department of Mechanical and Aerospace Engineering,and Department of Chemistry,The Hong Kong University of Science and Technology,Hong Kong,China [4]Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education),College of Chemistry,Nankai University,Tianjin 300071,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2021年第10期1675-1683,共9页矿物冶金与材料学报（英文版）

基　　金：the National Natural Science Foundation of China(No.21875076);the Science and Technology Planning Project of Guangdong Province(No.2018A05050677);the Undergraduates’Innovating Experimentation Project of Guangdong Province(No.S202110574025);the Undergraduates’Innovating Experimentation Project of China(No.202010574034)for financial support.

摘　　要：p-Benzoquinone(BQ)is a promising candidate for next-generation sodium-ion batteries(SIBs)because of its high theoretical specific capacity,good reaction reversibility,and high resource availability.However,practical application of BQ faces many challenges,such as a low discharge plateau(~2.7 V)as cathode material or a high discharge plateau as anode material compared with inorganic materials for SIBs and high solubility in organic electrolytes,resulting in low power and energy densities.Here,tetrahydroxybenzoquinone tetrasodium salt(Na_(4)C_(6)O_(6))is synthesized through a simple neutralization reaction at low temperatures.The four-ONa electron-donating groups introduced on the structure of BQ greatly lower the discharge plateau by over 1.4 V from ~2.70 V to ~1.26 V,which can change BQ from cathode to anode material for SIBs.At the same time,the addition of four-ONa hydrophilic groups inhibits the dissolution of BQ in the organic electrolyte to a certain extent.As a result,Na_(4)C_(6)O_(6) as the anode displays a moderate discharge capacity and cycling performance at an average work voltage of ~1.26 V versus Na/Na^(+).When evaluated as a Na-ion full cell(NIFC),a Na_(3)V_(2)(PO_(4))_(3)||Na_(4)C_(6)O_(6) NIFC reveals a moderate discharge capacity and an average discharge plateau of ~1.4 V.This research offers a new molecular structure design strategy for reducing the discharge plateau and simultaneously restraining the dissolution of organic electrode materials.

关 键 词：discharge plateau electron-donating groups DISSOLUTION sodium-ion batteries 

分 类 号：TM912[电气工程—电力电子与电力传动]