Insight into the effect of graphene coating on cycling stability of LiNi0.5Mn1.5O4: Integration of structure-stability and surface-stability
Graphene has presented promising features for application in lithium ion batteries(LIBs) due to its superior electronic conductivity and high surface area. It has been successfully used for modifying cathode materials to meet the increasing demand for LIBs with longer cycle life. However, the improv...
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| Format: | Article |
| Language: | English |
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Elsevier
2020-12-01
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| Series: | Journal of Materiomics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352847820301076 |
| _version_ | 1827841415513636864 |
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| author | Chao Gao Haiping Liu Sifu Bi Shanshan Fan Xiaohuan Meng Qiuying Li Chongxiao Luo |
| author_facet | Chao Gao Haiping Liu Sifu Bi Shanshan Fan Xiaohuan Meng Qiuying Li Chongxiao Luo |
| author_sort | Chao Gao |
| collection | DOAJ |
| description | Graphene has presented promising features for application in lithium ion batteries(LIBs) due to its superior electronic conductivity and high surface area. It has been successfully used for modifying cathode materials to meet the increasing demand for LIBs with longer cycle life. However, the improving effect of graphene on cycling stability is still unclear, which restricts its further application in LIBs. Herein, graphene coated hollow sphere-like structure LiNi0.5Mn1.5O4(LNMO) wasdesigned and the improvement mechanism of graphene coating on LNMO’s cycling stability was investigated. The results show that graphene coating not only contributes to suppress structural deformation from mechanistic reaction and extend solid-solution reaction, but also helps protect electrode from corrosion by the products from electrolyte decomposition and suppress the generation of surface defects, especially at high temperature. Owing to graphene coating, graphene coated LNMO can deliver a discharge capacity of 91 mAh g−1 with high capacity retention of 82.5% after 1000 cycles under 20C and 83.8 mAh g−1 with 94.5% capacity retention after 100 cycles under 2C at 55 °C. This work deeply explores the effect of graphene coating on cycling stability from crystal stability and surface stability, which will help a wider application of graphene in energy storage field. |
| first_indexed | 2024-03-12T07:51:02Z |
| format | Article |
| id | doaj.art-a8e2b72ada5244369ef7fd4c316d12e4 |
| institution | Directory Open Access Journal |
| issn | 2352-8478 |
| language | English |
| last_indexed | 2024-03-12T07:51:02Z |
| publishDate | 2020-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materiomics |
| spelling | doaj.art-a8e2b72ada5244369ef7fd4c316d12e42023-09-02T20:37:31ZengElsevierJournal of Materiomics2352-84782020-12-0164712722Insight into the effect of graphene coating on cycling stability of LiNi0.5Mn1.5O4: Integration of structure-stability and surface-stabilityChao Gao0Haiping Liu1Sifu Bi2Shanshan Fan3Xiaohuan Meng4Qiuying Li5Chongxiao Luo6School of Marine Science and Technology, Harbin Institute of Technology, Weihai 264209, ChinaSchool of Marine Science and Technology, Harbin Institute of Technology, Weihai 264209, China; Corresponding author.School of Materials Science and Engineering, Harbin Institute of Technology, Weihai 264209, ChinaSchool of Marine Science and Technology, Harbin Institute of Technology, Weihai 264209, ChinaSchool of Marine Science and Technology, Harbin Institute of Technology, Weihai 264209, ChinaSchool of Marine Science and Technology, Harbin Institute of Technology, Weihai 264209, ChinaShanghai Institute of Space Power-Sources, Shanghai 200245, ChinaGraphene has presented promising features for application in lithium ion batteries(LIBs) due to its superior electronic conductivity and high surface area. It has been successfully used for modifying cathode materials to meet the increasing demand for LIBs with longer cycle life. However, the improving effect of graphene on cycling stability is still unclear, which restricts its further application in LIBs. Herein, graphene coated hollow sphere-like structure LiNi0.5Mn1.5O4(LNMO) wasdesigned and the improvement mechanism of graphene coating on LNMO’s cycling stability was investigated. The results show that graphene coating not only contributes to suppress structural deformation from mechanistic reaction and extend solid-solution reaction, but also helps protect electrode from corrosion by the products from electrolyte decomposition and suppress the generation of surface defects, especially at high temperature. Owing to graphene coating, graphene coated LNMO can deliver a discharge capacity of 91 mAh g−1 with high capacity retention of 82.5% after 1000 cycles under 20C and 83.8 mAh g−1 with 94.5% capacity retention after 100 cycles under 2C at 55 °C. This work deeply explores the effect of graphene coating on cycling stability from crystal stability and surface stability, which will help a wider application of graphene in energy storage field.http://www.sciencedirect.com/science/article/pii/S2352847820301076Graphene coatingLiNi0.5Mn1.5O4Cycle stabilityStructure stabilitySurface stability |
| spellingShingle | Chao Gao Haiping Liu Sifu Bi Shanshan Fan Xiaohuan Meng Qiuying Li Chongxiao Luo Insight into the effect of graphene coating on cycling stability of LiNi0.5Mn1.5O4: Integration of structure-stability and surface-stability Journal of Materiomics Graphene coating LiNi0.5Mn1.5O4 Cycle stability Structure stability Surface stability |
| title | Insight into the effect of graphene coating on cycling stability of LiNi0.5Mn1.5O4: Integration of structure-stability and surface-stability |
| title_full | Insight into the effect of graphene coating on cycling stability of LiNi0.5Mn1.5O4: Integration of structure-stability and surface-stability |
| title_fullStr | Insight into the effect of graphene coating on cycling stability of LiNi0.5Mn1.5O4: Integration of structure-stability and surface-stability |
| title_full_unstemmed | Insight into the effect of graphene coating on cycling stability of LiNi0.5Mn1.5O4: Integration of structure-stability and surface-stability |
| title_short | Insight into the effect of graphene coating on cycling stability of LiNi0.5Mn1.5O4: Integration of structure-stability and surface-stability |
| title_sort | insight into the effect of graphene coating on cycling stability of lini0 5mn1 5o4 integration of structure stability and surface stability |
| topic | Graphene coating LiNi0.5Mn1.5O4 Cycle stability Structure stability Surface stability |
| url | http://www.sciencedirect.com/science/article/pii/S2352847820301076 |
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