Chen, Jintao;
Chen, Guanxu;
Zhao, Siyu;
Feng, Junrun;
Wang, Ryan;
Parkin, Ivan P;
He, Guanjie;
(2022)
Robust Biomass-Derived Carbon Frameworks as High-Performance Anodes in Potassium-Ion Batteries.
Small
, Article e2206588. 10.1002/smll.202206588.
(In press).
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Abstract
Potassium-ion batteries (PIBs) have become one of the promising candidates for electrochemical energy storage that can provide low-cost and high-performance advantages. The poor cyclability and rate capability of PIBs are due to the intensive structural change of electrode materials during battery operation. Carbon-based materials as anodes have been successfully commercialized in lithium- and sodium-ion batteries but is still struggling in potassium-ion battery field. This work conducts structural engineering strategy to induce anionic defects within the carbon structures to boost the kinetics of PIBs anodes. The carbon framework provides a strong and stable structure to accommodate the volume variation of materials during cycling, and the further phosphorus doping modification is shown to enhance the rate capability. This is found due to the change of the pore size distribution, electronic structures, and hence charge storage mechanism. The optimized electrode in this work shows a high capacity of 175 mAh g^{-1} at a current density of 0.2 A g^{-1} and the enhancement of rate performance as the PIB anode (60% capacity retention with the current density increase of 50 times). This work, therefore provides a rational design for guiding future research on carbon-based anodes for PIBs.
Type: | Article |
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Title: | Robust Biomass-Derived Carbon Frameworks as High-Performance Anodes in Potassium-Ion Batteries |
Location: | Germany |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1002/smll.202206588 |
Publisher version: | https://doi.org/10.1002/smll.202206588 |
Language: | English |
Additional information: | © 2022 The Authors. Small published by Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/). |
Keywords: | anodes, carbon materials, high-rate, potassium-ion batteries |
UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
URI: | https://discovery.ucl.ac.uk/id/eprint/10161672 |
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