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Enhanced Cycling Stability of LiCu(x)Mn(1.95−x)Si(0.05)O(4) Cathode Material Obtained by Solid-State Method

The LiCu(x)Mn(1.95−x)Si(0.05)O(4) (x = 0, 0.02, 0.05, 0.08) samples have been obtained by a simple solid-state method. XRD and SEM characterization results indicate that the Cu-Si co-doped spinels retain the inherent structure of LiMn(2)O(4) and possess uniform particle size distribution. Electroche...

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Detalles Bibliográficos
Autores principales: Zhao, Hongyuan, Li, Fang, Bai, Xiuzhi, Wu, Tingting, Wang, Zhankui, Li, Yongfeng, Su, Jianxiu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6117723/
https://www.ncbi.nlm.nih.gov/pubmed/30060499
http://dx.doi.org/10.3390/ma11081302
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author Zhao, Hongyuan
Li, Fang
Bai, Xiuzhi
Wu, Tingting
Wang, Zhankui
Li, Yongfeng
Su, Jianxiu
author_facet Zhao, Hongyuan
Li, Fang
Bai, Xiuzhi
Wu, Tingting
Wang, Zhankui
Li, Yongfeng
Su, Jianxiu
author_sort Zhao, Hongyuan
collection PubMed
description The LiCu(x)Mn(1.95−x)Si(0.05)O(4) (x = 0, 0.02, 0.05, 0.08) samples have been obtained by a simple solid-state method. XRD and SEM characterization results indicate that the Cu-Si co-doped spinels retain the inherent structure of LiMn(2)O(4) and possess uniform particle size distribution. Electrochemical tests show that the optimal Cu-doping amount produces an obvious improvement effect on the cycling stability of LiMn(1.95)Si(0.05)O(4). When cycled at 0.5 C, the optimal LiCu(0.05)Mn(1.90)Si(0.05)O(4) sample exhibits an initial capacity of 127.3 mAh g(−1) with excellent retention of 95.7% after 200 cycles. Moreover, when the cycling rate climbs to 10 C, the LiCu(0.05)Mn(1.90)Si(0.05)O(4) sample exhibits 82.3 mAh g(−1) with satisfactory cycling performance. In particular, when cycled at 55 °C, this co-doped sample can show an outstanding retention of 94.0% after 100 cycles, whiles the LiMn(1.95)Si(0.05)O(4) only exhibits low retention of 79.1%. Such impressive performance shows that the addition of copper ions in the Si-doped spinel effectively remedy the shortcomings of the single Si-doping strategy and the Cu-Si co-doped spinel can show excellent cycling stability.
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spelling pubmed-61177232018-09-05 Enhanced Cycling Stability of LiCu(x)Mn(1.95−x)Si(0.05)O(4) Cathode Material Obtained by Solid-State Method Zhao, Hongyuan Li, Fang Bai, Xiuzhi Wu, Tingting Wang, Zhankui Li, Yongfeng Su, Jianxiu Materials (Basel) Article The LiCu(x)Mn(1.95−x)Si(0.05)O(4) (x = 0, 0.02, 0.05, 0.08) samples have been obtained by a simple solid-state method. XRD and SEM characterization results indicate that the Cu-Si co-doped spinels retain the inherent structure of LiMn(2)O(4) and possess uniform particle size distribution. Electrochemical tests show that the optimal Cu-doping amount produces an obvious improvement effect on the cycling stability of LiMn(1.95)Si(0.05)O(4). When cycled at 0.5 C, the optimal LiCu(0.05)Mn(1.90)Si(0.05)O(4) sample exhibits an initial capacity of 127.3 mAh g(−1) with excellent retention of 95.7% after 200 cycles. Moreover, when the cycling rate climbs to 10 C, the LiCu(0.05)Mn(1.90)Si(0.05)O(4) sample exhibits 82.3 mAh g(−1) with satisfactory cycling performance. In particular, when cycled at 55 °C, this co-doped sample can show an outstanding retention of 94.0% after 100 cycles, whiles the LiMn(1.95)Si(0.05)O(4) only exhibits low retention of 79.1%. Such impressive performance shows that the addition of copper ions in the Si-doped spinel effectively remedy the shortcomings of the single Si-doping strategy and the Cu-Si co-doped spinel can show excellent cycling stability. MDPI 2018-07-27 /pmc/articles/PMC6117723/ /pubmed/30060499 http://dx.doi.org/10.3390/ma11081302 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhao, Hongyuan
Li, Fang
Bai, Xiuzhi
Wu, Tingting
Wang, Zhankui
Li, Yongfeng
Su, Jianxiu
Enhanced Cycling Stability of LiCu(x)Mn(1.95−x)Si(0.05)O(4) Cathode Material Obtained by Solid-State Method
title Enhanced Cycling Stability of LiCu(x)Mn(1.95−x)Si(0.05)O(4) Cathode Material Obtained by Solid-State Method
title_full Enhanced Cycling Stability of LiCu(x)Mn(1.95−x)Si(0.05)O(4) Cathode Material Obtained by Solid-State Method
title_fullStr Enhanced Cycling Stability of LiCu(x)Mn(1.95−x)Si(0.05)O(4) Cathode Material Obtained by Solid-State Method
title_full_unstemmed Enhanced Cycling Stability of LiCu(x)Mn(1.95−x)Si(0.05)O(4) Cathode Material Obtained by Solid-State Method
title_short Enhanced Cycling Stability of LiCu(x)Mn(1.95−x)Si(0.05)O(4) Cathode Material Obtained by Solid-State Method
title_sort enhanced cycling stability of licu(x)mn(1.95−x)si(0.05)o(4) cathode material obtained by solid-state method
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6117723/
https://www.ncbi.nlm.nih.gov/pubmed/30060499
http://dx.doi.org/10.3390/ma11081302
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