超级电容器
生物炭
材料科学
储能
化学工程
电容
分解水
可再生能源
纳米技术
电解水
功率密度
电解
电极
电解质
热解
催化作用
电气工程
化学
功率(物理)
物理
生物化学
物理化学
量子力学
光催化
工程类
作者
Chunxia Yan,Yaqi Yang,Jie Wang,Jianhua Hou,Ziqiang Shao
出处
期刊:Biochar
[Springer Nature]
日期:2023-12-15
卷期号:5 (1)
被引量:1
标识
DOI:10.1007/s42773-023-00266-2
摘要
Abstract Due to the rising need for clean and renewable energy, green materials including biochar are becoming increasingly popular in the field of energy storage and conversion. However, the lack of highly active and stable electrode materials hinders the development of stable energy supplies and efficient hydrogen production devices. Herein, we fabricated stable, conductive, and multifunctional chitosan microspheres by a facile emulsion crosslinking solution growth and hydrothermal sulphuration methods as multifunctional electrodes for overall water splitting driven by supercapacitors. This material possessed three-dimensional layered conductors with favorable heterojunction interface, ample hollow and porous structures. It presented remarkably enhanced electrochemical and catalytic activity for both supercapacitors and overall water electrolysis. The asymmetric supercapacitors based on chitosan biochar microsphere achieved high specific capacitance (260.9 F g −1 at 1 A g −1 ) and high energy density (81.5W h kg −1 ) at a power density of 978.4 W kg −1 . The chitosan biochar microsphere as an electrode for electrolyze only required a low cell voltage of 1.49 V to reach a current density of 10 mA cm −2 , and achieved excellent stability with 30 h continuous test at 20 mA cm −2 . Then, we assembled a coupled energy storage device and hydrogen production system, the SCs as a backup power source availably guaranteed the continuous operation of overall water electrolysis. Our study provides valuable perspectives into the practical design of both integrated biochar-based electrode materials and coupled energy storage devices with energy conversion and storage in practical. Graphical Abstract
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