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Fast‐Rate Capable Electrode Material with Higher Energy Density than LiFePO(4): 4.2V LiVPO(4)F Synthesized by Scalable Single‐Step Solid‐State Reaction

Use of compounds that contain fluorine (F) as electrode materials in lithium ion batteries has been considered, but synthesizing single‐phase samples of these compounds is a difficult task. Here, it is demonstrated that a simple scalable single‐step solid‐state process with additional fluorine sourc...

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Autores principales: Kim, Minkyung, Lee, Seongsu, Kang, Byoungwoo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5064735/
https://www.ncbi.nlm.nih.gov/pubmed/27774395
http://dx.doi.org/10.1002/advs.201500366
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author Kim, Minkyung
Lee, Seongsu
Kang, Byoungwoo
author_facet Kim, Minkyung
Lee, Seongsu
Kang, Byoungwoo
author_sort Kim, Minkyung
collection PubMed
description Use of compounds that contain fluorine (F) as electrode materials in lithium ion batteries has been considered, but synthesizing single‐phase samples of these compounds is a difficult task. Here, it is demonstrated that a simple scalable single‐step solid‐state process with additional fluorine source can obtain highly pure LiVPO(4)F. The resulting material with submicron particles achieves very high rate capability ≈100 mAh g(−1) at 60 C‐rate (1‐min discharge) and even at 200 C‐rate (18 s discharge). It retains superior capacity, ≈120 mAh g(−1) at 10 C charge/10 C discharge rate (6‐min) for 500 cycles with >95% retention efficiency. Furthermore, LiVPO(4)F shows low polarization even at high rates leading to higher operating potential >3.45 V (≈3.6 V at 60 C‐rate), so it achieves high energy density. It is demonstrated for the first time that highly pure LiVPO(4)F can achieve high power capability comparable to LiFePO(4) and much higher energy density (≈521 Wh g(−1) at 20 C‐rate) than LiFePO(4) even without nanostructured particles. LiVPO(4)F can be a real substitute of LiFePO(4.)
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spelling pubmed-50647352016-10-19 Fast‐Rate Capable Electrode Material with Higher Energy Density than LiFePO(4): 4.2V LiVPO(4)F Synthesized by Scalable Single‐Step Solid‐State Reaction Kim, Minkyung Lee, Seongsu Kang, Byoungwoo Adv Sci (Weinh) Full Papers Use of compounds that contain fluorine (F) as electrode materials in lithium ion batteries has been considered, but synthesizing single‐phase samples of these compounds is a difficult task. Here, it is demonstrated that a simple scalable single‐step solid‐state process with additional fluorine source can obtain highly pure LiVPO(4)F. The resulting material with submicron particles achieves very high rate capability ≈100 mAh g(−1) at 60 C‐rate (1‐min discharge) and even at 200 C‐rate (18 s discharge). It retains superior capacity, ≈120 mAh g(−1) at 10 C charge/10 C discharge rate (6‐min) for 500 cycles with >95% retention efficiency. Furthermore, LiVPO(4)F shows low polarization even at high rates leading to higher operating potential >3.45 V (≈3.6 V at 60 C‐rate), so it achieves high energy density. It is demonstrated for the first time that highly pure LiVPO(4)F can achieve high power capability comparable to LiFePO(4) and much higher energy density (≈521 Wh g(−1) at 20 C‐rate) than LiFePO(4) even without nanostructured particles. LiVPO(4)F can be a real substitute of LiFePO(4.) John Wiley and Sons Inc. 2015-12-29 /pmc/articles/PMC5064735/ /pubmed/27774395 http://dx.doi.org/10.1002/advs.201500366 Text en © 2015 The Authors. Published by WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim This is an open access article under the terms of the Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Full Papers
Kim, Minkyung
Lee, Seongsu
Kang, Byoungwoo
Fast‐Rate Capable Electrode Material with Higher Energy Density than LiFePO(4): 4.2V LiVPO(4)F Synthesized by Scalable Single‐Step Solid‐State Reaction
title Fast‐Rate Capable Electrode Material with Higher Energy Density than LiFePO(4): 4.2V LiVPO(4)F Synthesized by Scalable Single‐Step Solid‐State Reaction
title_full Fast‐Rate Capable Electrode Material with Higher Energy Density than LiFePO(4): 4.2V LiVPO(4)F Synthesized by Scalable Single‐Step Solid‐State Reaction
title_fullStr Fast‐Rate Capable Electrode Material with Higher Energy Density than LiFePO(4): 4.2V LiVPO(4)F Synthesized by Scalable Single‐Step Solid‐State Reaction
title_full_unstemmed Fast‐Rate Capable Electrode Material with Higher Energy Density than LiFePO(4): 4.2V LiVPO(4)F Synthesized by Scalable Single‐Step Solid‐State Reaction
title_short Fast‐Rate Capable Electrode Material with Higher Energy Density than LiFePO(4): 4.2V LiVPO(4)F Synthesized by Scalable Single‐Step Solid‐State Reaction
title_sort fast‐rate capable electrode material with higher energy density than lifepo(4): 4.2v livpo(4)f synthesized by scalable single‐step solid‐state reaction
topic Full Papers
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5064735/
https://www.ncbi.nlm.nih.gov/pubmed/27774395
http://dx.doi.org/10.1002/advs.201500366
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