Fibrous gel polymer electrolyte for an ultrastable and highly safe flexible lithium‐ion battery in a wide temperature range
Abstract Replacement of flammable liquid electrolytes with gel polymer electrolytes (GPEs) is a promising route to improve the safety of lithium‐ion batteries (LIBs). However, polymer‐based electrolytes have limited suitability at low/high temperatures due to the instability of the polymer at high t...
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Wiley
2021
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oai:doaj.org-article:ab22fc0961b146f796842cd85488faf82021-11-24T14:45:30ZFibrous gel polymer electrolyte for an ultrastable and highly safe flexible lithium‐ion battery in a wide temperature range2637-936810.1002/cey2.151https://doaj.org/article/ab22fc0961b146f796842cd85488faf82021-11-01T00:00:00Zhttps://doi.org/10.1002/cey2.151https://doaj.org/toc/2637-9368Abstract Replacement of flammable liquid electrolytes with gel polymer electrolytes (GPEs) is a promising route to improve the safety of lithium‐ion batteries (LIBs). However, polymer‐based electrolytes have limited suitability at low/high temperatures due to the instability of the polymer at high temperatures and the low ionic conductivity of the gel state at low temperatures. Herein, an integrated design of electrodes/fibrous GPEs modified with graphene oxide (GO) is reported. Due to the integrated structure of electrodes/GPEs, the strong interface affinity between electrodes and GPEs ensures that the GPEs spun on electrodes do not shrink at high temperatures (160–180°C), thus preventing a short circuit of electrodes. Moreover, after GO modification, oxygen‐containing functional groups of GO can accelerate Li+ transport of GO‐GPEs even at a low temperature of −15°C. When these GPEs are applied to flexible LIBs, the LIBs show excellent electrochemical performance, with satisfactory cycling stability of 82.9% at 1 C after 1000 cycles at 25°C. More importantly, at a high temperature of 160°C, the LIBs can also discharge normally and light the green light‐emitting diode. Furthermore, at a low temperature of −15°C, 92.7% of its room‐temperature capacity can be obtained due to the accelerated Li+ transport caused by GO modification, demonstrating the great potential of this electrolyte and integrated structure for practical gel polymer LIB applications.Ke LiWei ShenTao XuLu YangXiaobing XuFeiyao YangLijuan ZhangYangjian WangYaning ZhouMengjuan ZhongDi WeiWileyarticleflexible batterygel polymer electrolytegraphene oxidesafe lithium‐ion batteryProduction of electric energy or power. Powerplants. Central stationsTK1001-1841ENCarbon Energy, Vol 3, Iss 6, Pp 916-928 (2021) |
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DOAJ |
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DOAJ |
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EN |
| topic |
flexible battery gel polymer electrolyte graphene oxide safe lithium‐ion battery Production of electric energy or power. Powerplants. Central stations TK1001-1841 |
| spellingShingle |
flexible battery gel polymer electrolyte graphene oxide safe lithium‐ion battery Production of electric energy or power. Powerplants. Central stations TK1001-1841 Ke Li Wei Shen Tao Xu Lu Yang Xiaobing Xu Feiyao Yang Lijuan Zhang Yangjian Wang Yaning Zhou Mengjuan Zhong Di Wei Fibrous gel polymer electrolyte for an ultrastable and highly safe flexible lithium‐ion battery in a wide temperature range |
| description |
Abstract Replacement of flammable liquid electrolytes with gel polymer electrolytes (GPEs) is a promising route to improve the safety of lithium‐ion batteries (LIBs). However, polymer‐based electrolytes have limited suitability at low/high temperatures due to the instability of the polymer at high temperatures and the low ionic conductivity of the gel state at low temperatures. Herein, an integrated design of electrodes/fibrous GPEs modified with graphene oxide (GO) is reported. Due to the integrated structure of electrodes/GPEs, the strong interface affinity between electrodes and GPEs ensures that the GPEs spun on electrodes do not shrink at high temperatures (160–180°C), thus preventing a short circuit of electrodes. Moreover, after GO modification, oxygen‐containing functional groups of GO can accelerate Li+ transport of GO‐GPEs even at a low temperature of −15°C. When these GPEs are applied to flexible LIBs, the LIBs show excellent electrochemical performance, with satisfactory cycling stability of 82.9% at 1 C after 1000 cycles at 25°C. More importantly, at a high temperature of 160°C, the LIBs can also discharge normally and light the green light‐emitting diode. Furthermore, at a low temperature of −15°C, 92.7% of its room‐temperature capacity can be obtained due to the accelerated Li+ transport caused by GO modification, demonstrating the great potential of this electrolyte and integrated structure for practical gel polymer LIB applications. |
| format |
article |
| author |
Ke Li Wei Shen Tao Xu Lu Yang Xiaobing Xu Feiyao Yang Lijuan Zhang Yangjian Wang Yaning Zhou Mengjuan Zhong Di Wei |
| author_facet |
Ke Li Wei Shen Tao Xu Lu Yang Xiaobing Xu Feiyao Yang Lijuan Zhang Yangjian Wang Yaning Zhou Mengjuan Zhong Di Wei |
| author_sort |
Ke Li |
| title |
Fibrous gel polymer electrolyte for an ultrastable and highly safe flexible lithium‐ion battery in a wide temperature range |
| title_short |
Fibrous gel polymer electrolyte for an ultrastable and highly safe flexible lithium‐ion battery in a wide temperature range |
| title_full |
Fibrous gel polymer electrolyte for an ultrastable and highly safe flexible lithium‐ion battery in a wide temperature range |
| title_fullStr |
Fibrous gel polymer electrolyte for an ultrastable and highly safe flexible lithium‐ion battery in a wide temperature range |
| title_full_unstemmed |
Fibrous gel polymer electrolyte for an ultrastable and highly safe flexible lithium‐ion battery in a wide temperature range |
| title_sort |
fibrous gel polymer electrolyte for an ultrastable and highly safe flexible lithium‐ion battery in a wide temperature range |
| publisher |
Wiley |
| publishDate |
2021 |
| url |
https://doaj.org/article/ab22fc0961b146f796842cd85488faf8 |
| work_keys_str_mv |
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