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Porous SnO2/C Nanofiber Anodes and LiFePO4/C Nanofiber Cathodes with a Wrinkle Structure for Stretchable Lithium Polymer Batteries with High Electrochemical Performance
Advanced Science ( IF 14.3 ) Pub Date : 2020-07-19 , DOI: 10.1002/advs.202001358 O Hyeon Kwon 1 , Jang Hyeok Oh 2 , Bobae Gu 1 , Min Su Jo 2 , Se Hwan Oh 2 , Yun Chan Kang 3 , Jae-Kwang Kim 1 , Sang Mun Jeong 4 , Jung Sang Cho 2
Advanced Science ( IF 14.3 ) Pub Date : 2020-07-19 , DOI: 10.1002/advs.202001358 O Hyeon Kwon 1 , Jang Hyeok Oh 2 , Bobae Gu 1 , Min Su Jo 2 , Se Hwan Oh 2 , Yun Chan Kang 3 , Jae-Kwang Kim 1 , Sang Mun Jeong 4 , Jung Sang Cho 2
Affiliation
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Stretchable lithium batteries have attracted considerable attention as components in future electronic devices, such as wearable devices, sensors, and body‐attachment healthcare devices. However, several challenges still exist in the bid to obtain excellent electrochemical properties for stretchable batteries. Here, a unique stretchable lithium full‐cell battery is designed using 1D nanofiber active materials, stretchable gel polymer electrolyte, and wrinkle structure electrodes. A SnO2/C nanofiber anode and a LiFePO4/C nanofiber cathode introduce meso‐ and micropores for lithium‐ion diffusion and electrolyte penetration. The stretchable full‐cell consists of an elastic poly(dimethylsiloxane) (PDMS) wrapping film, SnO2/C and LiFePO4/C nanofiber electrodes with a wrinkle structure fixed on the PDMS wrapping film by an adhesive polymer, and a gel polymer electrolyte. The specific capacity of the stretchable full‐battery is maintained at 128.3 mAh g−1 (capacity retention of 92%) even after a 30% strain, as compared with 136.8 mAh g−1 before strain. The energy densities are 458.8 Wh kg−1 in the released state and 423.4 Wh kg−1 in the stretched state (based on the electrode), respectively. The high capacity and stability in the stretched state demonstrate the potential of the stretchable battery to overcome its limitations.
中文翻译：
具有皱纹结构的多孔SnO2/C纳米纤维阳极和LiFePO4/C纳米纤维阴极用于具有高电化学性能的可拉伸锂聚合物电池
可拉伸锂电池作为未来电子设备（例如可穿戴设备、传感器和身体附着医疗设备）的组件而引起了广泛关注。然而，要获得可拉伸电池优异的电化学性能，仍然存在一些挑战。这里，使用一维纳米纤维活性材料、可拉伸凝胶聚合物电解质和皱纹结构电极设计了一种独特的可拉伸锂全电池电池。SnO 2 /C纳米纤维阳极和LiFePO 4 /C纳米纤维阴极引入了介孔和微孔，用于锂离子扩散和电解质渗透。可拉伸全电池由弹性聚二甲基硅氧烷（PDMS）包裹膜、通过粘合聚合物固定在PDMS包裹膜上的具有皱纹结构的SnO 2 /C和LiFePO 4 /C纳米纤维电极以及凝胶聚合物电解质组成。即使在30%的应变后，可拉伸全电池的比容量仍保持在128.3 mAh g -1（容量保持率为92%），而应变前为136.8 mAh g -1。释放状态下的能量密度为458.8 Wh kg -1 ，拉伸状态下的能量密度为423.4 Wh kg -1（基于电极）。拉伸状态下的高容量和稳定性证明了可拉伸电池克服其局限性的潜力。
更新日期：2020-09-10
中文翻译：
具有皱纹结构的多孔SnO2/C纳米纤维阳极和LiFePO4/C纳米纤维阴极用于具有高电化学性能的可拉伸锂聚合物电池
可拉伸锂电池作为未来电子设备（例如可穿戴设备、传感器和身体附着医疗设备）的组件而引起了广泛关注。然而，要获得可拉伸电池优异的电化学性能，仍然存在一些挑战。这里，使用一维纳米纤维活性材料、可拉伸凝胶聚合物电解质和皱纹结构电极设计了一种独特的可拉伸锂全电池电池。SnO 2 /C纳米纤维阳极和LiFePO 4 /C纳米纤维阴极引入了介孔和微孔，用于锂离子扩散和电解质渗透。可拉伸全电池由弹性聚二甲基硅氧烷（PDMS）包裹膜、通过粘合聚合物固定在PDMS包裹膜上的具有皱纹结构的SnO 2 /C和LiFePO 4 /C纳米纤维电极以及凝胶聚合物电解质组成。即使在30%的应变后，可拉伸全电池的比容量仍保持在128.3 mAh g -1（容量保持率为92%），而应变前为136.8 mAh g -1。释放状态下的能量密度为458.8 Wh kg -1 ，拉伸状态下的能量密度为423.4 Wh kg -1（基于电极）。拉伸状态下的高容量和稳定性证明了可拉伸电池克服其局限性的潜力。
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