“All‐In‐One” integrated ultrathin SnS 2 @3D multichannel carbon matrix power high‐areal–capacity lithium battery anode
“All‐In‐One” integrated ultrathin SnS 2 @3D multichannel carbon matrix power high‐areal–capacity lithium battery anode
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DOI：
10.1002/cey2.22
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发表时间：
2019-11
期刊：
影响因子：
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通讯作者：
Hongyi Xu;Chengxin Peng;Yuhua Yan;Fei Dong;Hao Sun;Junhe Yang;Shiyou Zheng
中科院分区：
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作者：
Hongyi Xu;Chengxin Peng;Yuhua Yan;Fei Dong;Hao Sun;Junhe Yang;Shiyou Zheng
构建具有高活性材料质量负载的厚度无关电极对于开发高能量可充电锂电池至关重要。在此，我们制作了一体化集成SnS2@3D多通道碳基质（SnS2@3DMCM）电极，在三维（3D）多通道的内壁内原位生长SnS2纳米片。源自天然木材的互连导电碳基质充当集成的多孔集流体，以利于电子传输并容纳大量SnS2纳米片，而大量的3D对齐多通道即使在高质量负载下也有利于快速离子传输，且与电极厚度无关。正如预期的那样，集成的SnS2@3DMCM电极表现出卓越的电化学锂存储性能，例如6.4 mAh cm−2的卓越高面积容量，在6.8 mA cm−2（10 C）电流下3 mAh cm− 2的高倍率容量，以及6.8 mA cm− 2的稳定循环性能和7 mg cm−2的高质量负载。利用天然来源方便地构建3D集成多孔电极为未来高性能锂电池铺平了新的道路。
Construction of a thickness‐independent electrode with high active material mass loading is crucial for the development of high energy rechargeable lithium battery. Herein, we fabricate an all‐in‐one integrated SnS2@3D multichannel carbon matrix (SnS2@3DMCM) electrode with in‐situ growth of ultrathin SnS2nanosheets inside the inner walls of three dimensional (3D) multichannels. The interconnected conductive carbon matrix derived from natural wood acts as an integrated porous current collector to avail the electrons transport and accommodate massive SnS2nanosheets, while plenty of 3D aligned multichannels facilitate fast ions transport with electrode thickness‐independent even under high mass loading. As expected, the integrated SnS2@3DMCM electrode exhibits remarkable electrochemical lithium storage performance, such as exceptional high‐areal‐capacity of 6.4 mAh cm−2, high rate capability of 3 mAh cm−2under current of 6.8 mA cm−2(10 C), and stable cycling performance of 6.8 mA cm−2with a high mass loading of 7 mg cm−2. The 3D integrated porous electrode constructing conveniently with the natural source paves new avenues towards future high‐performance lithium batteries.