Layered MnO2@PDA as cathode material toward high-performance aqueous zinc-ion batteries

被引：0

作者：

Li, Haiyang ^{[1
]}

Wang, Menglei ^{[1
]}

Lei, Xinyu ^{[1
]}

Hu, Boyou ^{[1
]}

Zhang, Hanlu ^{[1
,2
]}

Xing, Yutong ^{[1
]}

Zhang, Meng ^{[1
,2
,3
]}

机构：

[1] Henan Univ Technol, Sch Mat Sci & Engn, Zhengzhou 450001, Peoples R China

[2] Henan Univ Technol, Henan Int Joint Lab Nanophotoelectr Magnet Mat, Zhengzhou 450001, Henan, Peoples R China

[3] Henan Univ Technol, Henan Prov Engn Lab High Temp & Wear Resistant Mat, Zhengzhou 450001, Henan, Peoples R China

来源：

JOURNAL OF ENERGY STORAGE | 2024年 / 102卷

基金：

中国国家自然科学基金;

关键词：

Aqueous zinc-ion batteries; Layered MnO 2; Polydopamine modulation; High capacity; H + /Zn 2+ insertion mechanism; STORAGE MECHANISM; DELTA-MNO2; INTERCALATION; PERSPECTIVES; BETA-MNO2;

D O I：

10.1016/j.est.2024.113962

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Aqueous zinc-ion batteries (AZIBs) can benefit from a deep understanding of the electrochemical reaction mechanism of cathode materials, which can assist in resolving issues such as cathode dissolution and electrostatic interactions. We reported a straightforward two-step synthesis of polydopamine coated MnO2 2 (MnO2@PDA) 2 @PDA) and revealed the energy storage mechanisms in AZIBs. The layered structure of MnO2 2 creates a generous passage for the insertion of H+/Zn2+ + /Zn 2+ ions. Simultaneously, the plethora of functional groups within PDA exerts a robust desolvation effect, bolstering the transfer rate of H+/Zn2+. + /Zn 2+ . This effect significantly enhances the overall efficiency and performance of cathode. The AZIBs, incorporating MnO2@PDA 2 @PDA cathode material, consequently exhibit a satisfactory cycling capacity (412 mAh g- 1 at 0.1 A g- 1 ) and a superb specific energy (561.6 Wh kg- 1 at 136.34 W kg- 1 ). This work provides a new path for design strategies and catalytic mechanisms of MnO2@PDA 2 @PDA cathode.

引用

页数：10