One dimensional and coaxial polyaniline@tin dioxide@multi-wall carbon nanotube as advanced conductive additive free anode for lithium ion battery
One dimensional and coaxial polyaniline@tin dioxide@multi-wall carbon nanotube as advanced conductive additive free anode for lithium ion battery
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一维同轴聚苯胺@二氧化锡@多壁碳纳米管作为先进的无添加剂锂离子电池负极
DOI：
10.1016/j.cej.2017.07.106
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发表时间：
2018-02
影响因子：
15.1
通讯作者：
Xu Wu
中科院分区：
文献类型：
--
作者：
Wang Ming-Shan;Wang Zhi-Qiang;Chen Zhou;Yang Zhen-Liang;Tang Zhi-Liang;Luo Hong-Yu;Huang Yun;Li Xing;Xu Wu
本文设计了一种新颖的一维同轴polyaniline@tin dioxide@multi-wall碳纳米管（PANI@SnO2@MWCNT）复合材料，作为锂离子电池的先进导电无添加剂负极材料。首先，在表面活性剂P123的辅助下，将纳米级sno2粒子自组装在MWCNT表面，将sno2纳米粒子（~ 5 nm）固定在MWCNT骨架上，然后在MWCNT表面原位涂覆具有优异电子和锂离子导电性的柔性聚苯胺层。一维同轴PANI@SnO2@MWCNT通过包裹柔性聚苯胺涂层和一维MWCNT的缓冲层，可以有效地容纳sno2纳米颗粒在锂化和减薄过程中的体积膨胀。此外，聚苯胺与MWCNT的协同作用也明显提高了复合材料的电子电导率和锂离子电导率。结果表明，即使不添加导电添加剂，PANI@SnO2@MWCNT复合材料也表现出优异的倍率容量和稳定的循环性能。
In this paper, we design a novel one dimensional and coaxial polyaniline@tin dioxide@multi-wall carbon nanotube (PANI@SnO2@MWCNT) composite as advanced conductive additive free anode material for the lithium ion battery. The SnO2nanoparticles (∼5 nm) are firstly fixed on the conductive MWCNT skeleton by self-assembling the nano-sized SnO2particles on the surface of MWCNT with the assist of surfactant P123 then followed by in-situ coating a flexible layer of PANI with excellent electron and lithium ion conductivity. The one dimensional and coaxial PANI@SnO2@MWCNT can effectively accommodate the volume expansion of SnO2nanoparticles during lithiating and delithiating via the wrapping of the flexible coating layer of PANI and the buffer of the one dimensional MWCNT. Moreover, the electronic and lithium ionic conductivities of the composite are also obviously improved by the synergistic action between the PANI and MWCNT. As a result, the PANI@SnO2@MWCNT composite exhibits an excellent rate capacity and stable cycling performance even without the adding of the conductive additive.
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