基于废弃生物质原位合成蜂窝状镶嵌ZnS纳米点的N-S共掺杂炭纳米片的制备及其锂离子电池性能

The in situ formation of ZnS nanodots embedded in honeycomb-like N-S co-doped carbon nanosheets derived from waste biomass for use in lithium-ion batteries

以ZnCl_(2)为硬模板和锌源,三聚氰胺和硫脲为氮源和硫源,废弃生物质橘子皮为碳源,通过高温烧结和后续蚀刻处理制备出硫化锌纳米点与三维N-S共掺杂炭纳米片的纳米复合材料(ZnS/NS-CN)。当应用于锂离子电池时,ZnS/NSCN表现出较高的可逆容量(0.1 A g^(−1)下,循环300次后容量仍有853.5 mAh g^(−1)),优异的长期循环稳定性(5 A g^(−1)下,循环1000次后,容量保持率为70.1%)和优异的倍率性能。此外,在0.5~4 V下组装和测试的ZnS/NS-CN//LiNiCoMnO2全电池表现出优异的电池性能(在0.2 C下循环150次后容量为140.4 mAh g^(−1),能量密度为132.4 Wh kg^(−1))。

A nanocomposite of zinc sulfide nanodots imbedded in honeycomb-like N-S co-doped carbon nanosheets(ZnS/NS-CN)was synthesized from waste biomass orange peel using ZnCl_(2) as the hard template and zinc source,and melamine and thiourea as the respective nitrogen and sulfur sources.When used as the anode material in Li-ion batteries,ZnS/NS-CN has a high reversible capacity(853.5 mAh g^(−1) at 0.1 A g^(−1) after 300 cycles),an excellent long-term cycling stability(70.1%capacity retention after 1000 cycles at 5 A g^(−1))and an outstanding rate capability.Besides,a ZnS/NS-CN//LiNiCoMnO2 full cell tested at 0.5-4 V has an excellent battery performance(140.4 mAh g^(−1) at 0.2 C after 150 cycles with an energy density of 132.4 Wh kg^(−1)).