Photoassisted Li-ion de-intercalation and Ni? plus valence conversion win-win boost energy storage performance in Ni/CdS@Ni3S2-based Li-ion battery

被引：29

作者：

Dong, Qianwen ^{[1
]}

Wei, Meng ^{[1
]}

Zhang, Qiuman ^{[1
]}

Xiao, Lifeng ^{[1
]}

Cai, Xin ^{[1
]}

Zhang, Shengsen ^{[1
]}

Gao, Qiongzhi ^{[1
]}

Fang, Yueping ^{[1
,2
]}

Peng, Feng ^{[2
]}

Yang, Siyuan ^{[1
]}

机构：

[1] South China Agr Univ, Coll Mat & Energy, Guangdong Lab Lingnan Modern Agr, Key Lab Biobased Mat & Energy,Minist Educ, Guangzhou 510642, Peoples R China

[2] Guangzhou Univ, Sch Chem & Chem Engn, Guangzhou, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2023年 / 459卷

基金：

中国国家自然科学基金;

关键词：

Photocatalysts; Li -ion battery; Photo; -rechargeable; Solar energy storage; EVOLUTION; H-2; ELECTROCATALYSTS; PHOTOCATALYST; CATALYST; CATHODE; ARRAYS; XPS;

D O I：

10.1016/j.cej.2023.141542

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The development of bifunctional electrode with photoactivity and lithium storage properties is critical for manufacturing high-efficiency solar energy conversion/storage integrated devices. Herein, for the first time, Ni foam supported Ni3S2 nanosheets covered CdS photocatalyst, a core-shell heterojunction nanorods array (Ni/ CdS@Ni3S2), is employed as photoelectrode for photo-assisted lithium-ion batteries (PA-LIBs). The assembled PA-LIBs can be off-grid charged by net solar light and on-grid photoassisted charged/discharged, respectively. Without external bias voltage, the overall solar-to-electrical energy conversion efficiency reaches 0.11 %. In addition, during the photo-assisted charging/discharging processes, the solar to electricity energy conversion efficiency is increased to 3.5 % and 2.1 %, respectively, and the total special capacity of such photocell is significantly improved by 13.7 % and 15.9 % compared with its conventional electric energy charging/dis-charging battery. Impressively, the PA-LIB maintains good photo-responsive activity even after about 250 charge/discharge cycles. Mechanism investigation reveals that photo-assisted Li-ion de-intercalation and Ni delta+ valence conversion together boosts the lithium-ion storage reaction more completely, thus improving the energy storage performance of Ni/CdS@Ni3S2-based Li-ion battery.

引用

页数：10

共 67 条

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