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nidan10

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[资源] 2013-nature communication-导电聚合物稳定的硅作为锂离子负极

一篇使用导电聚合物稳定纳米Si的文章，最后获得3D POROUS的电极结构,导电聚合物相互交联包覆在Si上。有循环1000次和5000次的数据，比较稳定。不过mass loading 只有0.2–0.3 mg cm2.

Silicon has a high-specific capacity as an anode material for Li-ion batteries, and much research has been focused on overcoming the poor cycling stability issue associated with its large volume changes during charging and discharging processes, mostly through nanostructured material design. Here we report incorporation of a conducting polymer hydrogel into Si-based anodes: the hydrogel is polymerized in-situ, resulting in a well-connected threedimensional network structure consisting of Si nanoparticles conformally coated by the conducting polymer. Such a hierarchical hydrogel framework combines multiple advantageous features, including a continuous electrically conductive polyaniline network, binding with the Si surface through either the crosslinker hydrogen bonding with phytic acid or electrostatic interaction with the positively charged polymer, and porous space for volume expansion of Si particles. With this anode, we demonstrate a cycle life of 5,000 cycles with over 90% capacity retention at current density of 6.0Ag1.[ Last edited by nidan10 on 2013-7-28 at 18:49 ]

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附件 1 : Stable_Li-ion_battery_anodes_by_in-situ_polymerization_of_conducting_hydrogel_to_conformally_coat_silicon_nanoparticles.pdf

2013-07-27 09:29:57, 813.01 K

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