A Multifunctional Interlocked Binder with Synergistic In Situ Covalent and Hydrogen Bonding for High‐Performance Si Anode in Li‐ion Batteries
Abstract Silicon has garnered significant attention as a promising anode material for high‐energy density Li‐ion batteries. However, Si can be easily pulverized during cycling, which results in the loss of electrical contact and ultimately shortens battery lifetime. Therefore, the Si anode binder is...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2023-10-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202302144 |
| _version_ | 1797648670139613184 |
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| author | Jae Hyuk Hwang Eunji Kim Eun Young Lim Woohwa Lee Ji‐Oh Kim Inhye Choi Yong Seok Kim Dong‐Gyun Kim Jin Hong Lee Jong‐Chan Lee |
| author_facet | Jae Hyuk Hwang Eunji Kim Eun Young Lim Woohwa Lee Ji‐Oh Kim Inhye Choi Yong Seok Kim Dong‐Gyun Kim Jin Hong Lee Jong‐Chan Lee |
| author_sort | Jae Hyuk Hwang |
| collection | DOAJ |
| description | Abstract Silicon has garnered significant attention as a promising anode material for high‐energy density Li‐ion batteries. However, Si can be easily pulverized during cycling, which results in the loss of electrical contact and ultimately shortens battery lifetime. Therefore, the Si anode binder is developed to dissipate the enormous mechanical stress of the Si anode with enhanced mechanical properties. However, the interfacial stability between the Si anode binder and Cu current collector should also be improved. Here, a multifunctional thiourea polymer network (TUPN) is proposed as the Si anode binder. The TUPN binder provides the structural integrity of the Si anode with excellent tensile strength and resilience due to the epoxy‐amine and silanol‐epoxy covalent cross‐linking, while exhibiting high extensibility from the random coil chains with the hydrogen bonds of thiourea, oligoether, and isocyanurate moieties. Furthermore, the robust TUPN binder enhances the interfacial stability between the Si anode and current collector by forming a physical interaction. Finally, the facilitated Li‐ion transport and improved electrolyte wettability are realized due to the polar oligoether, thiourea, and isocyanurate moieties, respectively. The concept of this work is to highlight providing directions for the design of polymer binders for next‐generation batteries. |
| first_indexed | 2024-03-11T15:35:17Z |
| format | Article |
| id | doaj.art-9e42becc960a4476a8044c94534902f9 |
| institution | Directory Open Access Journal |
| issn | 2198-3844 |
| language | English |
| last_indexed | 2024-03-11T15:35:17Z |
| publishDate | 2023-10-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj.art-9e42becc960a4476a8044c94534902f92023-10-26T20:10:11ZengWileyAdvanced Science2198-38442023-10-011030n/an/a10.1002/advs.202302144A Multifunctional Interlocked Binder with Synergistic In Situ Covalent and Hydrogen Bonding for High‐Performance Si Anode in Li‐ion BatteriesJae Hyuk Hwang0Eunji Kim1Eun Young Lim2Woohwa Lee3Ji‐Oh Kim4Inhye Choi5Yong Seok Kim6Dong‐Gyun Kim7Jin Hong Lee8Jong‐Chan Lee9Advanced Materials Division Korea Research Institute of Chemical Technology 141 Gajeong‐ro, Yuseong‐gu Daejeon 34114 Republic of KoreaSchool of Chemical Engineering Pusan National University 2, Busandaehak‐ro 63beon‐gil, Geumjeong‐gu Busan 46421 Republic of KoreaSchool of Chemical Engineering Pusan National University 2, Busandaehak‐ro 63beon‐gil, Geumjeong‐gu Busan 46421 Republic of KoreaAdvanced Materials Division Korea Research Institute of Chemical Technology 141 Gajeong‐ro, Yuseong‐gu Daejeon 34114 Republic of KoreaSchool of Chemical Engineering Pusan National University 2, Busandaehak‐ro 63beon‐gil, Geumjeong‐gu Busan 46421 Republic of KoreaSchool of Chemical Engineering Pusan National University 2, Busandaehak‐ro 63beon‐gil, Geumjeong‐gu Busan 46421 Republic of KoreaAdvanced Materials Division Korea Research Institute of Chemical Technology 141 Gajeong‐ro, Yuseong‐gu Daejeon 34114 Republic of KoreaAdvanced Materials Division Korea Research Institute of Chemical Technology 141 Gajeong‐ro, Yuseong‐gu Daejeon 34114 Republic of KoreaSchool of Chemical Engineering Pusan National University 2, Busandaehak‐ro 63beon‐gil, Geumjeong‐gu Busan 46421 Republic of KoreaSchool of Chemical and Biological Engineering and Institute of Chemical Processes Seoul National University 599 Gwanak‐ro, Gwanak‐gu Seoul 08826 Republic of KoreaAbstract Silicon has garnered significant attention as a promising anode material for high‐energy density Li‐ion batteries. However, Si can be easily pulverized during cycling, which results in the loss of electrical contact and ultimately shortens battery lifetime. Therefore, the Si anode binder is developed to dissipate the enormous mechanical stress of the Si anode with enhanced mechanical properties. However, the interfacial stability between the Si anode binder and Cu current collector should also be improved. Here, a multifunctional thiourea polymer network (TUPN) is proposed as the Si anode binder. The TUPN binder provides the structural integrity of the Si anode with excellent tensile strength and resilience due to the epoxy‐amine and silanol‐epoxy covalent cross‐linking, while exhibiting high extensibility from the random coil chains with the hydrogen bonds of thiourea, oligoether, and isocyanurate moieties. Furthermore, the robust TUPN binder enhances the interfacial stability between the Si anode and current collector by forming a physical interaction. Finally, the facilitated Li‐ion transport and improved electrolyte wettability are realized due to the polar oligoether, thiourea, and isocyanurate moieties, respectively. The concept of this work is to highlight providing directions for the design of polymer binders for next‐generation batteries.https://doi.org/10.1002/advs.202302144in situ cross‐linkingLi‐ion batteriesmultifunctional bindersilicon anodesthiourea polymer network |
| spellingShingle | Jae Hyuk Hwang Eunji Kim Eun Young Lim Woohwa Lee Ji‐Oh Kim Inhye Choi Yong Seok Kim Dong‐Gyun Kim Jin Hong Lee Jong‐Chan Lee A Multifunctional Interlocked Binder with Synergistic In Situ Covalent and Hydrogen Bonding for High‐Performance Si Anode in Li‐ion Batteries Advanced Science in situ cross‐linking Li‐ion batteries multifunctional binder silicon anodes thiourea polymer network |
| title | A Multifunctional Interlocked Binder with Synergistic In Situ Covalent and Hydrogen Bonding for High‐Performance Si Anode in Li‐ion Batteries |
| title_full | A Multifunctional Interlocked Binder with Synergistic In Situ Covalent and Hydrogen Bonding for High‐Performance Si Anode in Li‐ion Batteries |
| title_fullStr | A Multifunctional Interlocked Binder with Synergistic In Situ Covalent and Hydrogen Bonding for High‐Performance Si Anode in Li‐ion Batteries |
| title_full_unstemmed | A Multifunctional Interlocked Binder with Synergistic In Situ Covalent and Hydrogen Bonding for High‐Performance Si Anode in Li‐ion Batteries |
| title_short | A Multifunctional Interlocked Binder with Synergistic In Situ Covalent and Hydrogen Bonding for High‐Performance Si Anode in Li‐ion Batteries |
| title_sort | multifunctional interlocked binder with synergistic in situ covalent and hydrogen bonding for high performance si anode in li ion batteries |
| topic | in situ cross‐linking Li‐ion batteries multifunctional binder silicon anodes thiourea polymer network |
| url | https://doi.org/10.1002/advs.202302144 |
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