新型炭材料2021，Vol.36Issue(4)：702-710,9.DOI:10.1016/S1872-5805(21)60082-3
二氧化锰基超级电容器的电荷储能机理研究进展
Charge storage mechanisms of manganese dioxide-based supercapacitors: A review
摘要
Abstract
Carbon-based materials, such as carbon nanotubes, graphene and mesoporous carbons, are typical electrochemical double-layer capacitive electrodes of supercapacitors (SCs). Although these carbon electrode materials have excellent electrochemic-al stability, they usually have a low capacitance. Therefore, pseudocapacitive materials are often combined with them to increase ca-pacitance. Among these pseudocapacitive materials, manganese dioxide (MnO2) has been widely used because of its high theoretical specific capacitance, low-cost, abundance, and environmentally friendly nature. However, the use of MnO2 often produces rather low actual specific capacitances due to its poor electrical conductivity, phase transformation and large volumetric changes during re-peated charge and discharge. To explore high-performance MnO2/carbon composite electrode materials, it is necessary to understand the charge storage mechanisms of MnO2. These are analyzed and classified into four types: surface chemisorption of cations, intercal-ation-deintercalation of cations, a tunnel storage mechanism and a charge compensation mechanism. Although the fourth involves pre-interaction of the cations in MnO2, the essence of all these mechanisms is the valence transition of manganese atoms between +3 and +4, and many mechanisms are usually involved in MnO2-based SCs because of the complicated charge storage process. Critical challenges and possible strategies for achieving high-performance MnO2/carbon-based SCs are discussed and prospective solutions are presented.关键词
碳基材料/二氧化锰/电荷储能机理/超级电容器Key words
Carbon-based materials/Manganese dioxide/Charge storage mechanism/Supercapacitors分类
通用工业技术引用本文复制引用
唐晓宁,朱绍宽,宁坚,杨兴富,胡敏艺,邵姣婧..二氧化锰基超级电容器的电荷储能机理研究进展[J].新型炭材料,2021,36(4):702-710,9.基金项目
This work was supported by the National Natur-al Science Foundation of China (Nos. 51972070,52062004 and 22065005), Key Project of Guizhou Provincial Science and Technology Foundation (No.[2020]1Z042), Cultivation Project of Guizhou Uni-versity (No. GDPY[2019]01), Introduction of Talent Research Fund of Guizhou University (No. 202052),and Open Laboratory Fund of Guizhou University(No. SYSKF2021-004). 基金项目:国家自然科学基金 (51972070, 52062004和22065005) （Nos. 51972070,52062004 and 22065005）
贵州省自然科学基金重点项目 ([2020]1Z042) （[2020]1Z042）
贵州大学培育项目(GDPY[2019]01) （GDPY[2019]01）
贵州大学引进人才科研项目(202052) （202052）
贵州大学实验室开放项目(SYSKF2021-004). （SYSKF2021-004）
