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Three dimensional Ti(3)C(2) MXene nanoribbon frameworks with uniform potassiophilic sites for the dendrite-free potassium metal anodes

Potassium (K) metal batteries hold great promise as an advanced electrochemical energy storage system because of their high theoretical capacity and cost efficiency. However, the practical application of K metal anodes has been limited by their poor cycling life caused by dendrite growth and large v...

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Autores principales: Shi, Haodong, Dong, Yanfeng, Zheng, Shuanghao, Dong, Cong, Wu, Zhong-Shuai
Formato: Online Artículo Texto
Lenguaje:English
Publicado: RSC 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9417470/
https://www.ncbi.nlm.nih.gov/pubmed/36132750
http://dx.doi.org/10.1039/d0na00515k
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author Shi, Haodong
Dong, Yanfeng
Zheng, Shuanghao
Dong, Cong
Wu, Zhong-Shuai
author_facet Shi, Haodong
Dong, Yanfeng
Zheng, Shuanghao
Dong, Cong
Wu, Zhong-Shuai
author_sort Shi, Haodong
collection PubMed
description Potassium (K) metal batteries hold great promise as an advanced electrochemical energy storage system because of their high theoretical capacity and cost efficiency. However, the practical application of K metal anodes has been limited by their poor cycling life caused by dendrite growth and large volume changes during the plating/stripping process. Herein, three-dimensional (3D) alkalized Ti(3)C(2) (a-Ti(3)C(2)) MXene nanoribbon frameworks were demonstrated as advanced scaffolds for dendrite-free K metal anodes. Benefiting from the 3D interconnected porous structure for sufficient K accommodation, improved surface area for low local current density, preintercalated K in expanded interlayer spacing, and abundant functional groups as potassiophilic nuleation sites for uniform K plating/stripping, the as-formed a-Ti(3)C(2) frameworks successfully suppressed the K dendrites and volume changes at both high capacity and current density. As a result, the a-Ti(3)C(2) based electrodes exhibited an ultrahigh coulombic efficiency of 99.4% at a current density of 3 mA cm(−2) with long lifespan up to 300 cycles, and excellent stability for 700 h even at an ultrahigh plating capacity of 10 mA h cm(−2). When matched with K(2)Ti(4)O(9) cathodes, the resulting a-Ti(3)C(2)–K//K(2)Ti(4)O(9) full batteries offered a greatly enhanced rate capacity of 82.9 mA h g(−1) at 500 mA g(−1) and an excellent cycling stability with high capacity retention (77.7% after 600 cycles) at 200 mA g(−1), demonstrative of the great potential of a-Ti(3)C(2) for advanced K-metal batteries.
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spelling pubmed-94174702022-09-20 Three dimensional Ti(3)C(2) MXene nanoribbon frameworks with uniform potassiophilic sites for the dendrite-free potassium metal anodes Shi, Haodong Dong, Yanfeng Zheng, Shuanghao Dong, Cong Wu, Zhong-Shuai Nanoscale Adv Chemistry Potassium (K) metal batteries hold great promise as an advanced electrochemical energy storage system because of their high theoretical capacity and cost efficiency. However, the practical application of K metal anodes has been limited by their poor cycling life caused by dendrite growth and large volume changes during the plating/stripping process. Herein, three-dimensional (3D) alkalized Ti(3)C(2) (a-Ti(3)C(2)) MXene nanoribbon frameworks were demonstrated as advanced scaffolds for dendrite-free K metal anodes. Benefiting from the 3D interconnected porous structure for sufficient K accommodation, improved surface area for low local current density, preintercalated K in expanded interlayer spacing, and abundant functional groups as potassiophilic nuleation sites for uniform K plating/stripping, the as-formed a-Ti(3)C(2) frameworks successfully suppressed the K dendrites and volume changes at both high capacity and current density. As a result, the a-Ti(3)C(2) based electrodes exhibited an ultrahigh coulombic efficiency of 99.4% at a current density of 3 mA cm(−2) with long lifespan up to 300 cycles, and excellent stability for 700 h even at an ultrahigh plating capacity of 10 mA h cm(−2). When matched with K(2)Ti(4)O(9) cathodes, the resulting a-Ti(3)C(2)–K//K(2)Ti(4)O(9) full batteries offered a greatly enhanced rate capacity of 82.9 mA h g(−1) at 500 mA g(−1) and an excellent cycling stability with high capacity retention (77.7% after 600 cycles) at 200 mA g(−1), demonstrative of the great potential of a-Ti(3)C(2) for advanced K-metal batteries. RSC 2020-07-27 /pmc/articles/PMC9417470/ /pubmed/36132750 http://dx.doi.org/10.1039/d0na00515k Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/
spellingShingle Chemistry
Shi, Haodong
Dong, Yanfeng
Zheng, Shuanghao
Dong, Cong
Wu, Zhong-Shuai
Three dimensional Ti(3)C(2) MXene nanoribbon frameworks with uniform potassiophilic sites for the dendrite-free potassium metal anodes
title Three dimensional Ti(3)C(2) MXene nanoribbon frameworks with uniform potassiophilic sites for the dendrite-free potassium metal anodes
title_full Three dimensional Ti(3)C(2) MXene nanoribbon frameworks with uniform potassiophilic sites for the dendrite-free potassium metal anodes
title_fullStr Three dimensional Ti(3)C(2) MXene nanoribbon frameworks with uniform potassiophilic sites for the dendrite-free potassium metal anodes
title_full_unstemmed Three dimensional Ti(3)C(2) MXene nanoribbon frameworks with uniform potassiophilic sites for the dendrite-free potassium metal anodes
title_short Three dimensional Ti(3)C(2) MXene nanoribbon frameworks with uniform potassiophilic sites for the dendrite-free potassium metal anodes
title_sort three dimensional ti(3)c(2) mxene nanoribbon frameworks with uniform potassiophilic sites for the dendrite-free potassium metal anodes
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9417470/
https://www.ncbi.nlm.nih.gov/pubmed/36132750
http://dx.doi.org/10.1039/d0na00515k
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