煤基活性炭双杂原子掺杂的协同机制及其储锌性能提升OA
The doping of coal-based activated carbon with both B and N for use as the cathode of high performance aqueous zinc-ion hybrid capacitors
水性锌离子电容器因其高理论比容量与出色可靠性,在储能领域展现出巨大潜力.杂原子掺杂碳材料被认为能够有效提升其电容性能,然而相关储存机制尚不明确.本研究以煤基活性炭为载体,通过硼、氮双杂原子功能化制备正极材料.该材料在 1 A g-1 电流密度下实现 371.4 mAh g-1 的高比容量,并在 10 000次循环后容量保持率达74%.结合实验表征与密度泛函理论计算发现,吡啶氮在锌离子存储过程中发挥关键作用,显著提升了电化学可逆性.本研究为高容量、长寿命锌离子电容器碳基正极的理性设计提供了重要参考.
Aqueous zinc-ion capa-citors(ZICs)have significant po-tential as energy storage systems because of their high specific ca-pacity and superior reliability.Het-eroatom-doped carbon materials were known to substantially in-crease the capacitance of ZICs,however the mechanism remains poorly understood.Coal-based ac-tivated carbon was functionalized with B and N to serve as the cath-ode material in ZICs.This modi-fication gave the material a high specific capacity of 371.4 mAh g-1 at 1 A g-1 and it retained 74%of its initial capacity after 10 000 cycles.Experimental results and density functional theory calculations revealed that pyridinic N plays a crucial role in increasing Zn2+storage,demonstrat-ing superior electrochemical reversibility.This work gives valuable insight into the design of high-capacity and ultrafast pseudocapacitive carbon cathodes for ZICs.
刘淑源;田真;王延忠;周瑞;郑智超
中北大学 材料科学与工程学院,山西 太原 030051||高效储制氢技术与应用山西省重点实验室(中北大学),山西 太原 030051中北大学 材料科学与工程学院,山西 太原 030051||高效储制氢技术与应用山西省重点实验室(中北大学),山西 太原 030051中北大学 材料科学与工程学院,山西 太原 030051||高效储制氢技术与应用山西省重点实验室(中北大学),山西 太原 030051中北大学 材料科学与工程学院,山西 太原 030051||高效储制氢技术与应用山西省重点实验室(中北大学),山西 太原 030051中北大学 材料科学与工程学院,山西 太原 030051||高效储制氢技术与应用山西省重点实验室(中北大学),山西 太原 030051
化学化工
杂原子掺杂锌离子电容器煤基活性炭正极材料
Heteroatom dopingZinc-ion capacitorCoal based activated carbonCathode
《新型炭材料（中英文）》 2026 (2)
379-392,14
This work was supported by National Natural Science Foundation of China(52202051),the Key Re-search and Development(R&D)Projects of Shanxi Province(202202040201005).The authors extend their gratitude to Zhang Huifang(from Scientific Compass www.shiyanjia.com)for providing invalu-able assistance with the measurement analysis. 国家自然科学基金项目(52202051)山西省重点研发项目(202202040201005).
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