Preparation of Biomass-Derived Carbon Materials via Molten Salt Method and Their Supercapacitor Performance

IF 1.7 4区工程技术 Q3 ELECTROCHEMISTRY

Electrochemistry Pub Date : 2025-09-11 DOI:10.5796/electrochemistry.25-71119

Yun Jing, Yanqing Cai, Xiaosong Wei, Xinggang Chen

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引用次数: 1

Abstract

Biomass (corn cob) derived porous carbon with a very high surface area for supercapacitor application is reported by carbonization with a non-toxic mixed salt of NaCl and KCl as the reaction medium.The corn cob was subjected to molten salt carbonization in a molten NaCl-KCl system (mass ratio of 1:5) at 800 C, porous carbon material (C-1-5) with a high specific surface area (1054.36m g) and a threedimensional honeycomb network structure was obtained.The electrode material exhibits a specific capacitance of 222.5 F g in a three-electrode system at a current density of 0.1 A g.The assembled symmetric supercapacitor achieves a specific capacitance of 76.47 F g at a scan rate of 5 mV s.The energy density is 6.22 Wh kg at a power density of 50 W kg, and the capacitance retention reaches 96.30% after 2000 cycles.This green and simple technology is expected to become an effective and scalable method for producing porous carbon from biomass for electrochemical energy storage applications.

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熔盐法制备生物质衍生碳材料及其超级电容器性能

以无毒的氯化钠和氯化钾混合盐为反应介质，对生物质（玉米芯）衍生的多孔碳进行了炭化处理，制备出具有很高表面积的多孔碳，可用于超级电容器。在熔融NaCl-KCl体系中（质量比为1:5），在800℃下进行熔盐碳化，得到了具有高比表面积（1054.36m g）和三维蜂窝网络结构的多孔碳材料（C-1-5）。在电流密度为0.1 g的三电极体系中，电极材料的比电容为222.5 F g，组装的对称超级电容器在扫描速率为5 mV时的比电容为76.47 F g，在功率密度为50 W kg时的能量密度为6.22 Wh kg，循环2000次后的电容保持率达到96.30%。这种绿色、简单的技术有望成为一种有效的、可扩展的从生物质中生产多孔碳的电化学储能应用方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Electrochemistry 工程技术-电化学

CiteScore

1.70

自引率

8.00%

发文量

审稿时长

1.0 months

期刊介绍： Electrochemistry (Denki Kagaku oyobi Kogyobutsurikagaku) was divided into an on-line journal, Electrochemisty and a magazine Denki Kagaku from 2018. Electrochemistry is devoted to the publication of Research papers (Articles, Technological Reports, Notes, Communications, Comprehensive Papers, and Reviews) written in English and Japanese in the field of electrochemistry and applied physical chemistry. Denki Kagaku is a separate magazine to the members of The Electrochemical Society of Japan (ECSJ).