纳米多孔NiO类空心微球负极材料的制备与储锂性能
发布时间：2018-10-08 18:51
【摘要】：以NiCl_2·6H_2O、尿素、葡萄糖为原料采用水热法制备了NiO前体,将前体在空气中烧结最终得到NiO电极活性材料。该NiO样品具有镂空结构的类空心球形貌,且由50~100 nm初级纳米颗粒构成。对该NiO样品作为锂离子电池负极材料的储锂性能进行了研究,结果发现赝电容效应对该材料储锂容量和倍率性能有重要贡献。因独特的空心纳米结构和赝电容效应,该材料表现出出色的电化学循环稳定性和优异的大倍率充放电性能。在500m A·g~(-1)电流密度下,100圈充放电循环后放电比容量为650 m A·h·g~(-1),容量保持率达86.6%;在10 A·g~(-1)的超高倍率下,其稳定放电比容量仍高达432 m A·h·g~(-1)。
[Abstract]:The precursor of NiO was prepared by hydrothermal method using NiCl_2 6H _ 2O, urea and glucose as raw materials. The precursor was sintered in air to obtain the active material of NiO electrode. The NiO samples have hollow like spheres with hollow structure and are made up of 50 ~ (100) nm primary nanocrystalline particles. The lithium storage performance of the NiO sample as a cathode material for lithium ion battery was studied. It was found that the pseudo-capacitance effect had an important contribution to the lithium storage capacity and the ratio performance of the material. Due to its unique hollow nanostructure and pseudo-capacitance effect, the material exhibits excellent electrochemical cycling stability and excellent charge-discharge performance at large rate. At the current density of 500 Ma g ~ (-1), the specific discharge capacity is 650 m A h g ~ (-1) after charge and discharge cycle, and the capacity retention is up to 86.6%, and the steady discharge specific capacity is still up to 432 m A h g ~ (-1) at 10 A g ~ (-1).
【作者单位】： 广西电磁化学功能物质重点实验室桂林理工大学化学与生物工程学院;桂林理工大学广西有色金属隐伏矿床勘查及材料开发协同创新中心;
【基金】：国家自然科学基金项目(21263003,51664012,51464009) 广西自然科学基金项目(2015GXNSFGA139006,2014GXNSFBA118238) 广西研究生教育创新计划项目(YCSW2017158)~~
【分类号】：TM912
本文编号：2257885
[Abstract]:The precursor of NiO was prepared by hydrothermal method using NiCl_2 6H _ 2O, urea and glucose as raw materials. The precursor was sintered in air to obtain the active material of NiO electrode. The NiO samples have hollow like spheres with hollow structure and are made up of 50 ~ (100) nm primary nanocrystalline particles. The lithium storage performance of the NiO sample as a cathode material for lithium ion battery was studied. It was found that the pseudo-capacitance effect had an important contribution to the lithium storage capacity and the ratio performance of the material. Due to its unique hollow nanostructure and pseudo-capacitance effect, the material exhibits excellent electrochemical cycling stability and excellent charge-discharge performance at large rate. At the current density of 500 Ma g ~ (-1), the specific discharge capacity is 650 m A h g ~ (-1) after charge and discharge cycle, and the capacity retention is up to 86.6%, and the steady discharge specific capacity is still up to 432 m A h g ~ (-1) at 10 A g ~ (-1).
【作者单位】： 广西电磁化学功能物质重点实验室桂林理工大学化学与生物工程学院;桂林理工大学广西有色金属隐伏矿床勘查及材料开发协同创新中心;
【基金】：国家自然科学基金项目(21263003,51664012,51464009) 广西自然科学基金项目(2015GXNSFGA139006,2014GXNSFBA118238) 广西研究生教育创新计划项目(YCSW2017158)~~
【分类号】：TM912
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