Magnesium Anchoring Strategy for Stabilizing Graphene‐Hosted Lithium Metal Battery
Lithium metal‐graphene host composite is a promising anode material for high‐energy‐density Li battery owing to its three‐dimensional structure, micro‐level controllable thickness and ultrahigh specific capacity. However, we discover that the hydroxyl/carboxyl functional groups in the reduced graphe...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2024-02-01
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| Series: | Small Structures |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/sstr.202300345 |
| _version_ | 1797321002809556992 |
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| author | Yaoyao Liu Chao Cui Lequan Deng Zhaofen Wang Lutan Dong Huitong Dong Xiaoru Zhao Ke-Peng Song Yuanhua Sang Hong Liu Shuhua Wang Hao Chen |
| author_facet | Yaoyao Liu Chao Cui Lequan Deng Zhaofen Wang Lutan Dong Huitong Dong Xiaoru Zhao Ke-Peng Song Yuanhua Sang Hong Liu Shuhua Wang Hao Chen |
| author_sort | Yaoyao Liu |
| collection | DOAJ |
| description | Lithium metal‐graphene host composite is a promising anode material for high‐energy‐density Li battery owing to its three‐dimensional structure, micro‐level controllable thickness and ultrahigh specific capacity. However, we discover that the hydroxyl/carboxyl functional groups in the reduced graphene oxide (rGO) host are likely to be reduced into lithium carbonate composition in the solid‐electrolyte interphase (SEI), which resulted in severe lithium dendrite growth that deteriorate its electrochemical performances. Here, we develop a magnesium anchoring strategy that selectively bond the Mg ion with the hydroxyl/carboxyl groups in rGO host, generating an electrolyte‐derived lithium fluoride‐dominant SEI instead of oxygen groups‐derived, lithium carbonate‐dominant SEI. By anchoring 0.60% of Mg in the rGO host using a facile compositing‐pyrolysis approach, Li dendrite growth in anode can be significantly suppressed, and the cycling stability of Li metal full cells can be prolonged by 200%. These findings give new insight into the mechanism of SEI formation in Li metal anode, and provide a new design strategy for restraining the reduced reaction of hydroxyl/carboxyl groups in graphene to stabilize the composite anode of lithium metal battery. |
| first_indexed | 2024-03-08T04:51:14Z |
| format | Article |
| id | doaj.art-0442004f5c854b28a748f7a3f1d60365 |
| institution | Directory Open Access Journal |
| issn | 2688-4062 |
| language | English |
| last_indexed | 2024-03-08T04:51:14Z |
| publishDate | 2024-02-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Small Structures |
| spelling | doaj.art-0442004f5c854b28a748f7a3f1d603652024-02-08T03:06:33ZengWiley-VCHSmall Structures2688-40622024-02-0152n/an/a10.1002/sstr.202300345Magnesium Anchoring Strategy for Stabilizing Graphene‐Hosted Lithium Metal BatteryYaoyao Liu0Chao Cui1Lequan Deng2Zhaofen Wang3Lutan Dong4Huitong Dong5Xiaoru Zhao6Ke-Peng Song7Yuanhua Sang8Hong Liu9Shuhua Wang10Hao Chen11State Key Laboratory of Crystal Materials Shandong University Ji'nan 250100 P. R. ChinaState Key Laboratory of Crystal Materials Shandong University Ji'nan 250100 P. R. ChinaState Key Laboratory of Crystal Materials Shandong University Ji'nan 250100 P. R. ChinaState Key Laboratory of Crystal Materials Shandong University Ji'nan 250100 P. R. ChinaState Key Laboratory of Crystal Materials Shandong University Ji'nan 250100 P. R. ChinaState Key Laboratory of Crystal Materials Shandong University Ji'nan 250100 P. R. ChinaState Key Laboratory of Crystal Materials Shandong University Ji'nan 250100 P. R. ChinaState Key Laboratory of Crystal Materials Shandong University Ji'nan 250100 P. R. ChinaState Key Laboratory of Crystal Materials Shandong University Ji'nan 250100 P. R. ChinaState Key Laboratory of Crystal Materials Shandong University Ji'nan 250100 P. R. ChinaState Key Laboratory of Crystal Materials Shandong University Ji'nan 250100 P. R. ChinaState Key Laboratory of Crystal Materials Shandong University Ji'nan 250100 P. R. ChinaLithium metal‐graphene host composite is a promising anode material for high‐energy‐density Li battery owing to its three‐dimensional structure, micro‐level controllable thickness and ultrahigh specific capacity. However, we discover that the hydroxyl/carboxyl functional groups in the reduced graphene oxide (rGO) host are likely to be reduced into lithium carbonate composition in the solid‐electrolyte interphase (SEI), which resulted in severe lithium dendrite growth that deteriorate its electrochemical performances. Here, we develop a magnesium anchoring strategy that selectively bond the Mg ion with the hydroxyl/carboxyl groups in rGO host, generating an electrolyte‐derived lithium fluoride‐dominant SEI instead of oxygen groups‐derived, lithium carbonate‐dominant SEI. By anchoring 0.60% of Mg in the rGO host using a facile compositing‐pyrolysis approach, Li dendrite growth in anode can be significantly suppressed, and the cycling stability of Li metal full cells can be prolonged by 200%. These findings give new insight into the mechanism of SEI formation in Li metal anode, and provide a new design strategy for restraining the reduced reaction of hydroxyl/carboxyl groups in graphene to stabilize the composite anode of lithium metal battery.https://doi.org/10.1002/sstr.202300345composite lithium metal anodesgraphenemagnesium anchoringsolid–electrolyte interphases |
| spellingShingle | Yaoyao Liu Chao Cui Lequan Deng Zhaofen Wang Lutan Dong Huitong Dong Xiaoru Zhao Ke-Peng Song Yuanhua Sang Hong Liu Shuhua Wang Hao Chen Magnesium Anchoring Strategy for Stabilizing Graphene‐Hosted Lithium Metal Battery Small Structures composite lithium metal anodes graphene magnesium anchoring solid–electrolyte interphases |
| title | Magnesium Anchoring Strategy for Stabilizing Graphene‐Hosted Lithium Metal Battery |
| title_full | Magnesium Anchoring Strategy for Stabilizing Graphene‐Hosted Lithium Metal Battery |
| title_fullStr | Magnesium Anchoring Strategy for Stabilizing Graphene‐Hosted Lithium Metal Battery |
| title_full_unstemmed | Magnesium Anchoring Strategy for Stabilizing Graphene‐Hosted Lithium Metal Battery |
| title_short | Magnesium Anchoring Strategy for Stabilizing Graphene‐Hosted Lithium Metal Battery |
| title_sort | magnesium anchoring strategy for stabilizing graphene hosted lithium metal battery |
| topic | composite lithium metal anodes graphene magnesium anchoring solid–electrolyte interphases |
| url | https://doi.org/10.1002/sstr.202300345 |
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