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首页> 外文期刊>RSC Advances >Micron-sized SiOx/N-doped carbon composite spheres fabricated with biomass chitosan for high-performance lithium-ion battery anodes
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Micron-sized SiOx/N-doped carbon composite spheres fabricated with biomass chitosan for high-performance lithium-ion battery anodes

机译：用生物量壳聚糖为高性能锂离子电池阳极制造微米尺寸的SiOx / N掺杂碳复合球

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摘要

To achieve superior lithium storage performance, SiO _( x ) is usually designed into nanostructured SiO _( x ) /C composites by complex or expensive methods. Here, micron-sized interconnected SiO _( x ) /N-doped carbon (NC) microspheres composed of evenly dispersed SiO _( x ) nano-domains and NC have been fabricated by a scalable microemulsion method and following pyrolysis, using vinyltriethoxysilane and chitosan as precursors. The unique structure of the micron-sized SiO _( x ) /NC spheres leads to enhanced structural integrity and enables stable long-term cycling (800 cycles at 2 A g ~(?1) ). Benefiting from the enhanced electron/Li ~(+) diffusion kinetics originated from the unique structure and N-doping, SiO _( x ) /NC-2 presents considerable capacitive-controlled Li storage capacity, which leads to outstanding rate capability. Consequently, the assembled SiO _( x ) /NC-2//LiFePO _(4) full cell exhibits superior rate capability (106 mA h g ~(?1) at 4C) and stable long-term cycling at 2C (102 mA h g ~(?1) after 350 cycles). This work opens a new door for the application of chitosan in building micron-sized high-performance SiO _( x ) /C anode materials, and to some extent facilitates the recycling of waste seafood shells.
机译：为了实现卓越的锂储存性能，SiO_（X）通常设计成通过复杂或昂贵的方法设计成纳米结构SiO_（x）/ c复合材料。这里，通过可伸缩的微乳液法和含有乙烯基三氧基硅烷和壳聚糖，由均匀分散的SiO _（X）纳米域和NC构成的微米尺寸的互连SiO_（X）/ n掺杂的碳（NC）微球和NC由可伸缩的微乳液法制造和在热解之后。作为前体。微米尺寸SiO _（X）/ NC球体的独特结构导致结构完整性增强，使得能够稳定的长期循环（800个循环为2A G〜（α1））。从增强的电子/ Li〜（+）扩散动力学中源于独特的结构和N掺杂，SIO _（X）/ NC-2呈现出相当大的电容控制的LI存储容量，这导致出色的速率能力。因此，组装的SiO _（x）/ nc-2 // LiFepo _（4）全细胞表现出优异的速率能力（106 mA Hg〜（α1）在4℃下），并且在2℃下稳定的长期循环（102 ma Hg 350次循环后的〜（？1）。这项工作为壳聚糖在构建微米大小的高性能SiO_（X）/ C阳极材料方面打开了一个新的门，并且在一定程度上有助于废弃海鲜壳的再循环。

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