文献类型：期刊文献

英文题名：Hierarchical Hollow Carbon Particles with Encapsulation of Carbon Nanotubes for High Performance Supercapacitors

作者：Song, Guoqiang Li, Claudia Wang, Tian Lim, Kang Hui Hu, Feiyang Cheng, Shuwen Hondo, Emmerson Liu, Shaomin Kawi, Sibudjing

第一作者：Song, Guoqiang

通信作者：Kawi, S[1]

机构：[1]Natl Univ Singapore, Dept Chem & Biomol Engn, 4 Engn Dr 4, Singapore 119260, Singapore;[2]Guizhou Inst Technol, Sch Chem Engn, Guiyang 550003, Guizhou, Peoples R China;[3]Tiangong Univ, State Key Lab Separat Membranes & Membrane Proc, Tianjin 300387, Peoples R China

第一机构：Natl Univ Singapore, Dept Chem & Biomol Engn, 4 Engn Dr 4, Singapore 119260, Singapore

通信机构：corresponding author), Natl Univ Singapore, Dept Chem & Biomol Engn, 4 Engn Dr 4, Singapore 119260, Singapore.

年份：2023

外文期刊名：SMALL

收录：;EI(收录号：20233614686075);Scopus(收录号：2-s2.0-85169665028);WOS:【SCI-EXPANDED(收录号:WOS:001058728200001)】；

基金：This research is supported by the National Research Foundation, Singapore, and A*STAR under its Low-Carbon Energy Research (LCER) Funding Initiative (FI) Project (U2102d2011, WBS: A-8000278-00-00), the Singapore Ministry of Education Academic Research Fund (MOE AcRF) Tier 1 Project (WBS: A-0009184-00-00) and National Natural Science Foundation of China (22062003).

语种：英文

外文关键词：carbon nanotubes; hierarchical; hollow carbon; methane pyrolysis; supercapacitors

摘要：A novel and sustainable carbon-based material, referred to as hollow porous carbon particles encapsulating multi-wall carbon nanotubes (MWCNTs) (CNTs@HPC), is synthesized for use in supercapacitors. The synthesis process involves utilizing LTA zeolite as a rigid template and dopamine hydrochloride (DA) as the carbon source, along with catalytic decomposition of methane (CDM) to simultaneously produce MWCNTs and COx-free H2. The findings reveal a distinctive hierarchical porous structure, comprising macropores, mesopores, and micropores, resulting in a total specific surface area (SSA) of 913 m2 g-1. The optimal CNTs@HPC demonstrates a specific capacitance of 306 F g-1 at a current density of 1 A g-1. Moreover, this material demonstrates an electric double-layer capacitor (EDLC) that surpasses conventional capabilities by exhibiting additional pseudocapacitance characteristics. These properties are attributed to redox reactions facilitated by the increased charge density resulting from the attraction of ions to nickel oxides, which is made possible by the material's enhanced hydrophilicity. The heightened hydrophilicity can be attributed to the presence of residual silicon-aluminum elements in CNTs@HPC, a direct outcome of the unique synthesis approach involving nickel phyllosilicate in CDM. As a result of this synthesis strategy, the material possesses excellent conductivity, enabling rapid transportation of electrolyte ions and delivering outstanding capacitive performance. The paper highlights the synthesis and characterization of a novel hollow hierarchical carbon-based material with carbon nanotubes encapsulated within. It possesses a unique hierarchical porous structure with macropores, mesopores, and micropores. The material demonstrates high conductivity, large surface area, and exceptional capacitive performance, making it a promising candidate for high-performance supercapacitors.image