Citation: Mengying XU, Wen LI, Junzhong MEI, Cheng ZHANG, Kannan Palanisamy, Lei LU, Lianpeng ZHANG, Peng WANG. Manganese-doped poly(1,5-diaminonaphthalene) based high-performance supercapacitors[J]. Chinese Journal of Inorganic Chemistry, ;2026, 42(2): 387-397. doi: 10.11862/CJIC.20250211 shu

Manganese-doped poly(1,5-diaminonaphthalene) based high-performance supercapacitors

Mengying XU ^{1, 2, #} ,
Wen LI ^{1, 3, 4, #} ,
Junzhong MEI ⁵ ,
Cheng ZHANG ^{1, 4} ,
Kannan Palanisamy ^1,, ,
Lei LU ¹ ,
Lianpeng ZHANG ^{2, 3,,} ,
Peng WANG ^{1, 4,,}

1.
College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing, Zhejiang 314001, China
2.
Key Laboratory of National Forestry and Grassland Administration on Highly-Efficient Utilization of Forestry Biomass Resources in Southwest China, Southwest Forestry University, Kunming 650233, China
3.
Yunnan Provincial Key Laboratory of Wood Adhesives and Glued Products, Southwest Forestry University, Kunming 650224, China
4.
G60 STI Valley Industry & Innovation Institute, Jiaxing University, Jiaxing, Zhejiang 314001, China
5.
Industry Department, Development and Reform Commission, Jiaxing Government, Jiaxing, Zhejiang 314001, China

Corresponding author: Kannan Palanisamy, ktpkannan@zjxu.edu.cn Lianpeng ZHANG, lpz@zju.edu.cn Peng WANG, pengwang@zjxu.edu.cn
Received Date: 20 June 2025
Revised Date: 7 November 2025

Figures(5)

Herein, manganese (Mn)-doped poly(1, 5-diaminonaphthalene) (PN) electrode material (Mn@PN) was synthesized via chemical oxidative polymerization. The material′s distinctive vesicular architecture enables rapid ion transport while maintaining the structural stability of the electrode under continuous charge-discharge cycles. Electrochemical characterization under a three-electrode system revealed exceptional rate capability: Mn@PN delivered an ultrahigh specific capacitance of 10 318 F·g^-1 at a low current density of 3 A·g^-1 and retained 9 415 F·g^-1 (91.2% retention compared to the value at 3 A·g^-1) even at an ultrahigh current density of 50 A·g^-1. Moreover, the material exhibited 97.4% capacitance retention after 9 000 cycles at 30 A·g^-1, corresponding with a low capacitance decay rate of 0.003‰ per cycle, significantly outperforming conventional conductive polymers like polyaniline (PANI). An asymmetric supercapacitor assembled with Mn@PN as the positive electrode (Mn@PN||AC) achieved an energy density of 328 Wh·kg^-1 at 15 A·g^-1 and retained 80.7% of its initial specific capacitance after 4 000 cycles at 20 A·g^-1.
- poly(1,5-diaminonaphthalene),
- transition metal,
- long-cycle stability,
- supercapacitor
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