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High-performance silicon anode
产品编号: | 4084237 |
规格: | 1 micron silicon particles in crosslinked conducting polyanaline matrix |
包装规格: | 5 G |
产品类别: | 进口试剂 |
品牌: | Sigma-Aldrich |
优惠价: | 立即咨询 |
产品别名
High-performance silicon anode
Silicon micron particle
Doped polyaniline
Si encapsulated in 3D crosslinked polyaniline
Si/PANi composite
结构式
产品性质
Quality Level【质量水平】 | 100 |
form【形式】 | solid |
基本信息
Application【应用】 | Silicon is a most promising next generation lithium ion battery electrode material, due to its ~10 times higher specific capacity (3600 mAh/g) than graphite (372 mAh/g). However, silicon experiences large volume change (~400%) during lithium insertion, causing it to fracture and detach from current collector, rendering prototypical lithium-silicon batteries to lose most of their capacity in less than 10 charge-discharge cycles. A solution to the capacity and stability issues posed by the significant volume expansion upon lithiation of silicon is critical to the success of high capacity lithium ion batteries. This silicon/PANi composite utilizes a doped, intrinsically conductive, 3D cross-linked polyaniline as matrix, which could function as both the conductive binder and the polymer electrolyte for silicon-based electrodes. Previous study for a similar silicon-based three-dimensional conducting polymer composite demonstrated increased electrochemically performance due to short diffusion paths and good 3D connectivity, and resulted in a marked improvement in cyclability, with over 90% capacity retention after 5,000 cycles. This composite is made by encapsulating silicon particles in an in-situ polymerized 3D-crosslinked conductive polyaniline framework. This Si/PANi composite not only allows fast electrical and ionic transport, but also provides free space to allow giant volume expansion. This Si/PANi composite provides a ready-to-use electrochemically active silicon composite that would increase the capacity of conventional lithium ion battery, and improve the cycle-life of Si-based anodes. |
安全信息
Storage Class Code【储存分类代码】 | 11 - Combustible Solids |
WGK | WGK 3 |