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Chang, Jian; Shang, Jian; Sun, Yongming; Ono, Luis K; Wang, Dongrui; Ma, Zhijun; Huang, Qiyao; Chen, Dongdong; Liu, Guoqiang; Cui, Yi; Qi, Yabing; Zheng, Zijian
Nature communications, 10/2018, Letnik: 9, Številka: 1Journal Article
Lightweight and flexible energy storage devices are urgently needed to persistently power wearable devices, and lithium-sulfur batteries are promising technologies due to their low mass densities and high theoretical capacities. Here we report a flexible and high-energy lithium-sulfur full battery device with only 100% oversized lithium, enabled by rationally designed copper-coated and nickel-coated carbon fabrics as excellent hosts for lithium and sulfur, respectively. These metallic carbon fabrics endow mechanical flexibility, reduce local current density of the electrodes, and, more importantly, significantly stabilize the electrode materials to reach remarkable Coulombic efficiency of >99.89% for a lithium anode and >99.82% for a sulfur cathode over 400 half-cell charge-discharge cycles. Consequently, the assembled lithium-sulfur full battery provides high areal capacity (3 mA h cm ), high cell energy density (288 W h kg and 360 W h L ), excellent cycling stability (260 cycles), and remarkable bending stability at a small radius of curvature (<1 mm).
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in: SICRIS
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