Constructing volcanic-like mesoporous hard carbon with fast electrochemical kinetics for potassium-ion batteries and hybrid capacitors

被引：0

作者：

Liu Y. ^{[1
]}

Ru Q. ^{[1
]}

Gao Y. ^{[1
]}

An Q. ^{[2
]}

Chen F. ^{[1
]}

Shi Z. ^{[1
]}

Zheng M. ^{[1
]}

Pan Z. ^{[1
]}

机构：

[1] Guangdong Engineering Technology Research Center of Efficient Green Energy and Environmental Protection Materials, Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, School of Physics and Telecommunication Engineering, South

[2] State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan

来源：

Applied Surface Science | 2022年 / 525卷

关键词：

Boosting potassium-ion storage; Carbon anode; Polyimide; Potassium ion batteries; Potassium ion hybrid capacitors;

D O I：

10.1016/j.apsusc.2020.146563

中图分类号：

学科分类号：

摘要：

Potassium-ion batteries are considered as one of safe and low-cost alternatives to the traditional lithium-ion batteries. However, the sluggish potassium ion kinetics, drastic volume variation and inferior cyclic reversibility hinder the further development for the commercial applications. Herein, a new type of polyimide-inspired volcanic rock-like carbon is synthesized by pyrolyzing N/O-rich polymer precursor of polymeric 1, 4, 5, 8-Naphthalenetetracarboxylic dianhydride (PNTCDA). The synergetic effect of the mesoporous construction, the prominent capacitance and the ameliorated conductivity endows PNTCDA@900 with boosted potassium-ion electrochemical properties. As anodes for PIBs, the discharge capacity of 185.3 mAh g−1 can be achievable after 100 cycles at a current density of 0.05 A g−1, and the superior reversible capacity of 81 mAh g−1 is obtained even after 4000 cycles at a high current density of 2 A g−1. The cell can be operated in a reliable environmental adaptability with 115–205 mAh g−1 from −5 °C~70 °C at 0.1 A g−1. Furthermore, when applied to potassium-ion hybrid capacitors with active carbon as cathode, PNTCDA@900 delivers a reversible capacity of 53.5 mAh g−1 after 800 cycles at 2 A g−1. The current work will be significant for the development of potassium-ion storage. © 2020 Elsevier B.V.

引用

共 43 条

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