新型炭材料（中英文）2023，Vol.38Issue(5)：913-924,12.DOI:10.1016/S1872-5805(23)60769-3
在KOH活化的激光诱导石墨烯上沉积MnO2用于柔性平面微型超级电容器
Deposition of MnO2 on KOH-activated laser-produced graphene for a flexible planar micro-supercapacitor
摘要
Abstract
The rapid development of flexible supercapacitors has been impeded by the difficulty of preparing flexible electrodes.We report the fabrication of a highly flexible and conductive microporous graphene-based substrate obtained by direct laser writing combined with KOH activation,which we call activated laser-produced graphene(a-LPG),which is then decorated with electro-chemically deposited MnO2 to form a flexible a-LIG/MnO2 thin-film electrode.This hybrid electrode has a high areal capacitance of 304.61 mF/cm2 at a current density of 1 mA/cm2 in a 1 mol/L Na2SO4 aqueous electrolyte.A flexible asymmetric supercapacitor with a-LIG/MnO2 as the anode,a-LIG as the cathode and PVA/H3PO4 as a gel electrolyte was assembled,giving an areal energy density of 2.61 μWh/cm2 at a power density of 260.28 μW/cm2 and an ultra-high areal capacitance of 18.82 mF/cm2 at 0.2 mA/cm2,with 90.28%capacitance retained after 5000 cycles.It also has an excellent electrochemical performance even in the bent state.This work provides an easy and scalable method to design high-performance flexible supercapacitor electrodes and may open a new way for their large-scale fabrication.关键词
微型超级电容器/激光加工/柔性电极/多孔石墨烯Key words
Micro-supercapacitor/Laser processing/Flexible electrode/Porous graphene引用本文复制引用
习爽,高兴伟,程溪明,刘辉龙..在KOH活化的激光诱导石墨烯上沉积MnO2用于柔性平面微型超级电容器[J].新型炭材料（中英文）,2023,38(5):913-924,12.基金项目
This work was financially supported by the Nat-ural Science Foundation of Guangdong Province,China(2022A1515011334)and National Natural Sci-ence Foundation of China(52205457). 广东省自然科学基金(2022A1515011334) （2022A1515011334）
国家自然科学基金(52205457). （52205457）
