Structure and Electrochemical Behavior of Minor Mn-Doped Olivine LiMnxFe1−xPO4
In the recent years, olivine LiFePO4 has been considered as a prospective cathode material for lithium-ion batteries. However, low conductivity is an obstacle to the commercialization of LiFePO4; doping the transition metal such as Mn and Ni is one of the solutions for this issue. This work aimed to...
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doaj-7385ba383d6e4e1c97abf597fc1663ba2020-11-25T01:31:51ZengHindawi LimitedJournal of Chemistry2090-90632090-90712019-01-01201910.1155/2019/56385905638590Structure and Electrochemical Behavior of Minor Mn-Doped Olivine LiMnxFe1−xPO4Le Thanh Nguyen Huynh0Pham Phuong Nam Le1Viet Dung Trinh2Hong Huy Tran3Van Man Tran4My Loan Phung Le5Applied Physical Chemistry Laboratory (APCLAB), VNUHCM-University of Science, Ho Chi Minh City, VietnamApplied Physical Chemistry Laboratory (APCLAB), VNUHCM-University of Science, Ho Chi Minh City, VietnamSchool of Chemical Engineering, Hanoi University of Science and Technology, Hanoi, VietnamApplied Physical Chemistry Laboratory (APCLAB), VNUHCM-University of Science, Ho Chi Minh City, VietnamApplied Physical Chemistry Laboratory (APCLAB), VNUHCM-University of Science, Ho Chi Minh City, VietnamApplied Physical Chemistry Laboratory (APCLAB), VNUHCM-University of Science, Ho Chi Minh City, VietnamIn the recent years, olivine LiFePO4 has been considered as a prospective cathode material for lithium-ion batteries. However, low conductivity is an obstacle to the commercialization of LiFePO4; doping the transition metal such as Mn and Ni is one of the solutions for this issue. This work aimed to synthesize the Mn-doped olivines LiMnxFe1−xPO4 at low content of Mn (x = 0.1, 0.2) via the hydrothermal route followed by pyrolyzed carbon coating. The synthesized olivines were well crystallized in olivine structure, with larger lattice parameters compared with LiFePO4. The EXD and TGA results confirmed the coated carbon of 4.14% for LiMn0.1Fe0.9PO4 and 6.86% for LiMn0.2Fe0.8PO4. Both of Mn-doped olivines showed higher diffusion coefficients of Li+ intercalation than those of LiFePO4 that led a good performance in the cycling test. LiMn0.2Fe0.8PO4 exhibited a higher specific capacity (160 mAh/g) than LiMn0.1Fe0.9PO4 (155 mAh/g), and the Mn content is beneficial for the cycling performance as well as ionic conductivity.http://dx.doi.org/10.1155/2019/5638590 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Le Thanh Nguyen Huynh Pham Phuong Nam Le Viet Dung Trinh Hong Huy Tran Van Man Tran My Loan Phung Le |
spellingShingle |
Le Thanh Nguyen Huynh Pham Phuong Nam Le Viet Dung Trinh Hong Huy Tran Van Man Tran My Loan Phung Le Structure and Electrochemical Behavior of Minor Mn-Doped Olivine LiMnxFe1−xPO4 Journal of Chemistry |
author_facet |
Le Thanh Nguyen Huynh Pham Phuong Nam Le Viet Dung Trinh Hong Huy Tran Van Man Tran My Loan Phung Le |
author_sort |
Le Thanh Nguyen Huynh |
title |
Structure and Electrochemical Behavior of Minor Mn-Doped Olivine LiMnxFe1−xPO4 |
title_short |
Structure and Electrochemical Behavior of Minor Mn-Doped Olivine LiMnxFe1−xPO4 |
title_full |
Structure and Electrochemical Behavior of Minor Mn-Doped Olivine LiMnxFe1−xPO4 |
title_fullStr |
Structure and Electrochemical Behavior of Minor Mn-Doped Olivine LiMnxFe1−xPO4 |
title_full_unstemmed |
Structure and Electrochemical Behavior of Minor Mn-Doped Olivine LiMnxFe1−xPO4 |
title_sort |
structure and electrochemical behavior of minor mn-doped olivine limnxfe1−xpo4 |
publisher |
Hindawi Limited |
series |
Journal of Chemistry |
issn |
2090-9063 2090-9071 |
publishDate |
2019-01-01 |
description |
In the recent years, olivine LiFePO4 has been considered as a prospective cathode material for lithium-ion batteries. However, low conductivity is an obstacle to the commercialization of LiFePO4; doping the transition metal such as Mn and Ni is one of the solutions for this issue. This work aimed to synthesize the Mn-doped olivines LiMnxFe1−xPO4 at low content of Mn (x = 0.1, 0.2) via the hydrothermal route followed by pyrolyzed carbon coating. The synthesized olivines were well crystallized in olivine structure, with larger lattice parameters compared with LiFePO4. The EXD and TGA results confirmed the coated carbon of 4.14% for LiMn0.1Fe0.9PO4 and 6.86% for LiMn0.2Fe0.8PO4. Both of Mn-doped olivines showed higher diffusion coefficients of Li+ intercalation than those of LiFePO4 that led a good performance in the cycling test. LiMn0.2Fe0.8PO4 exhibited a higher specific capacity (160 mAh/g) than LiMn0.1Fe0.9PO4 (155 mAh/g), and the Mn content is beneficial for the cycling performance as well as ionic conductivity. |
url |
http://dx.doi.org/10.1155/2019/5638590 |
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