TY - JOUR
T1 - Structure Modulation of Defective Hierarchical Carbon Materials for Ultrahigh-Rate and Stable Energy Storage
AU - Sun, Mingming
AU - Guo, Wei
AU - Wang, Jinxin
AU - Xu, Yu
AU - Zhang, Guoxian
AU - Zhang, Qiuyu
N1 - Publisher Copyright:
© 2025 Wiley-VCH GmbH.
PY - 2025
Y1 - 2025
N2 - Carbon electrodes with abundant accessible pores and highly connected electronic highways are highly desired. However, the thermodynamically uncontrollable reaction interface and severe topology self-aggregation happen under the manufacturing process, which hinders the practical implementation of carbon materials. Here, a defective hierarchical carbon electrode is tailored through a straightforward inspissate gum calcination strategy, which contains highly connected nanotube subunits with rich defects (ID/IG>2.4) and functional groups. Theory simulation indicates the defect/heteroatoms on the curved carbon matrix increase the density of states near the Fermi level, which not only facilitates the electronic transfer but also enables the intimate adsorption of electrolyte ions, responsible for the efficient energy storage under large-current conditions. As such, the defective hierarchical carbon achieves a record-level rate property of 14k mV s−1 for electrochemical energy storage, besides, a sound capacitance of 6.2 F cm−2 is delivered at a high mass loading of 37 mg cm−2, superior to many state-of-the-art carbon materials. Moreover, the dynamic non-covalent interaction enables pre-machining of the carbon electrode, which is responsible for the formation of all-in-one binder-free symmetric supercapacitors with satisfactory performances. This work presents guidance and a fundamental understanding of the solid-solid interface reconstruction to promote the discovery of carbon microstructure.
AB - Carbon electrodes with abundant accessible pores and highly connected electronic highways are highly desired. However, the thermodynamically uncontrollable reaction interface and severe topology self-aggregation happen under the manufacturing process, which hinders the practical implementation of carbon materials. Here, a defective hierarchical carbon electrode is tailored through a straightforward inspissate gum calcination strategy, which contains highly connected nanotube subunits with rich defects (ID/IG>2.4) and functional groups. Theory simulation indicates the defect/heteroatoms on the curved carbon matrix increase the density of states near the Fermi level, which not only facilitates the electronic transfer but also enables the intimate adsorption of electrolyte ions, responsible for the efficient energy storage under large-current conditions. As such, the defective hierarchical carbon achieves a record-level rate property of 14k mV s−1 for electrochemical energy storage, besides, a sound capacitance of 6.2 F cm−2 is delivered at a high mass loading of 37 mg cm−2, superior to many state-of-the-art carbon materials. Moreover, the dynamic non-covalent interaction enables pre-machining of the carbon electrode, which is responsible for the formation of all-in-one binder-free symmetric supercapacitors with satisfactory performances. This work presents guidance and a fundamental understanding of the solid-solid interface reconstruction to promote the discovery of carbon microstructure.
KW - carbon nanotube
KW - curves
KW - high mass loading
KW - multiple-interaction
KW - ultrahigh rate
UR - http://www.scopus.com/inward/record.url?scp=105004354525&partnerID=8YFLogxK
U2 - 10.1002/adfm.202509551
DO - 10.1002/adfm.202509551
M3 - 文章
AN - SCOPUS:105004354525
SN - 1616-301X
JO - Advanced Functional Materials
JF - Advanced Functional Materials
ER -