硼氮共掺杂海藻酸钠基多孔炭及其快速高效储锌OA北大核心CSTPCD
Boron and nitrogen co-doped sodium alginate-based porous carbons for durable and fast Zn-ion hybrid capacitors
近年来,锌离子电容器(ZIHCs)因其环境友好性和优异的电化学性能而备受关注.然而,ZIHCs的研究体系尚不成熟,为改善ZIHCs的储能动力学和循环稳定性等问题,亟需研发出低成本和高性能的碳基电极材料.本工作以海藻酸钠为碳前驱体,五硼酸铵为氮源和硼源,采用一步水热活化策略合成了氮/硼含量较高的分级多孔炭(NBSPC).这种策略可以有效重塑炭的多孔结构,产生大量的活性位点,贡献额外的赝电容,从而提高其电化学性能.以NBSPC为正极构建了锌离子电容器,其在 40 A g-1 的超高电流密度下,可以实现 85.4 mAh g-1 优异的倍率性能,并在 10 A g-1 的电流密度下可以稳定循环15 000次,容量保持率高达94.5%.
In recent years,zinc-ion hybrid capacitors(ZIHCs)have attracted increasing attention due to their environmental friendliness and excellent electrochemical properties.However,their performance is mainly limited by the electrochemical perform-ance of the cathode,so it is necessary to develop an advanced cathode material.N,B co-doped sodium alginate-based porous carbon(NBSPC)was prepared by one-step co-carbonization using sodium alginate as the matrix and NH4B5O8 as the N and B source.This N,B co-doping strategy improves the pore structure of the carbon materials and increases the number of surface functional groups,greatly improving the capacitive behavior of the raw materials and thus improving their electrochemical performance.When used as the cathode in ZIHCs,the NBSPC had an excellent rate performance(85.4 mA h g-1 even at ultra-high current density of 40 A g-1)and good cycling stability(15 000 cycles at 20 A g-1 with a capacity retention rate of 94.5%).
卢亚平;王红星;刘澜涛;庞伟伟;陈晓红
北京化工大学 化工资源有效利用国家重点实验室 材料电化学过程与技术北京市重点实验室,北京 100029北京化工大学 化工资源有效利用国家重点实验室 材料电化学过程与技术北京市重点实验室,北京 100029||中国石油天然气股份有限公司石油化工研究院,北京 102206中国石油天然气股份有限公司石油化工研究院,北京 102206
化学工程
海藻酸钠衍生多孔炭氮/硼共掺杂一步水热活化锌离子电容器
Sodium alginate-based porous carbonN,B co-dopedOne step hydrothermal activationZinc-ion hybrid capacitors
《新型炭材料（中英文）》 2024 (003)
506-514 / 9
This work was supported by the National Natur-al Science Foundation of China(52372039). 国家自然科学基金(52372039).
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