1000 Wh L-1 lithium-ion batteries enabled by crosslink-shrunk tough carbon encapsulated silicon microparticle anodes
© The Author(s) 2021. Published by Oxford University Press on behalf of China Science Publishing & Media Ltd..
Microparticulate silicon (Si), normally shelled with carbons, features higher tap density and less interfacial side reactions compared to its nanosized counterpart, showing great potential to be applied as high-energy lithium-ion battery anodes. However, localized high stress generated during fabrication and particularly, under operating, could induce cracking of carbon shells and release pulverized nanoparticles, significantly deteriorating its electrochemical performance. Here we design a strong yet ductile carbon cage from an easily processing capillary shrinkage of graphene hydrogel followed by precise tailoring of inner voids. Such a structure, analog to the stable structure of plant cells, presents 'imperfection-tolerance' to volume variation of irregular Si microparticles, maintaining the electrode integrity over 1000 cycles with Coulombic efficiency over 99.5%. This design enables the use of a dense and thick (3 mAh cm-2) microparticulate Si anode with an ultra-high volumetric energy density of 1048 Wh L-1 achieved at pouch full-cell level coupled with a LiNi0.8Co0.1Mn0.1O2 cathode.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2021 |
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| Erschienen: |
2021 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:8 |
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| Enthalten in: |
National science review - 8(2021), 9 vom: 21. Sept., Seite nwab012 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Chen, Fanqi [VerfasserIn] |
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| Links: |
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| Themen: |
Anode |
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| Anmerkungen: |
Date Revised 03.04.2024 published: Electronic-eCollection Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1093/nsr/nwab012 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM332318311 |
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| 520 | |a © The Author(s) 2021. Published by Oxford University Press on behalf of China Science Publishing & Media Ltd. | ||
| 520 | |a Microparticulate silicon (Si), normally shelled with carbons, features higher tap density and less interfacial side reactions compared to its nanosized counterpart, showing great potential to be applied as high-energy lithium-ion battery anodes. However, localized high stress generated during fabrication and particularly, under operating, could induce cracking of carbon shells and release pulverized nanoparticles, significantly deteriorating its electrochemical performance. Here we design a strong yet ductile carbon cage from an easily processing capillary shrinkage of graphene hydrogel followed by precise tailoring of inner voids. Such a structure, analog to the stable structure of plant cells, presents 'imperfection-tolerance' to volume variation of irregular Si microparticles, maintaining the electrode integrity over 1000 cycles with Coulombic efficiency over 99.5%. This design enables the use of a dense and thick (3 mAh cm-2) microparticulate Si anode with an ultra-high volumetric energy density of 1048 Wh L-1 achieved at pouch full-cell level coupled with a LiNi0.8Co0.1Mn0.1O2 cathode | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a anode | |
| 650 | 4 | |a lithium-ion batteries | |
| 650 | 4 | |a mechanical stability | |
| 650 | 4 | |a silicon microparticles | |
| 650 | 4 | |a volumetric capacity | |
| 700 | 1 | |a Han, Junwei |e verfasserin |4 aut | |
| 700 | 1 | |a Kong, Debin |e verfasserin |4 aut | |
| 700 | 1 | |a Yuan, Yifei |e verfasserin |4 aut | |
| 700 | 1 | |a Xiao, Jing |e verfasserin |4 aut | |
| 700 | 1 | |a Wu, Shichao |e verfasserin |4 aut | |
| 700 | 1 | |a Tang, Dai-Ming |e verfasserin |4 aut | |
| 700 | 1 | |a Deng, Yaqian |e verfasserin |4 aut | |
| 700 | 1 | |a Lv, Wei |e verfasserin |4 aut | |
| 700 | 1 | |a Lu, Jun |e verfasserin |4 aut | |
| 700 | 1 | |a Kang, Feiyu |e verfasserin |4 aut | |
| 700 | 1 | |a Yang, Quan-Hong |e verfasserin |4 aut | |
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