硼氮共掺杂海藻酸钠基多孔炭的制备及其高效快速储锌的研究

LU Ya-ping; WANG Hong-xing; LIU Lan-tao; PANG Wei-wei; CHEN Xiao-hong

doi:10.1016/S1872-5805(24)60847-4

硼氮共掺杂海藻酸钠基多孔炭的制备及其高效快速储锌的研究

doi: 10.1016/S1872-5805(24)60847-4

卢亚平^1,,
王红星^1,,
刘澜涛^{1, 2},
庞伟伟²,
陈晓红^1, ,

1.
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
2.
中国石油天然气股份有限公司石油化工研究院, 北京 102206

基金项目: 国家自然科学基金(51972014)

详细信息

通讯作者:
陈晓红，教授. E-mail：chenxh@mail.buct.edu.cn

中图分类号: TQ152
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出版历程
- 收稿日期: 2024-01-26
- 录用日期: 2024-03-22
- 修回日期: 2024-03-21
- 网络出版日期: 2024-03-27

Boron and nitrogen co-doped sodium alginate-based porous carbon for durable and fast Zn-ion hybrid capacitor

1.
State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, China
2.
Petrochemical Research Institute, PetroChina Company Limited, 102206 Beijing, China

Funds: This work was supported by the National Natural Science Foundation of China (52372039)

More Information

Author Bio:
^†卢亚平和王红星为共同第一作者

Corresponding author: CHEN Xiao-hong: E-mail: chenxh@mail.buct.edu.cn

摘要

摘要: 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炭基电极材料。在本文中，我们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/硼含量极高的分级多孔炭（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15000次，容量保持率高达94.5%。
- 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
Abstract: In recent years, zinc-ion hybrid capacitors (ZIHCs) have attracted increasing attention due to their environmental friendliness and excellent electrochemical properties. However, the performance of ZIHCs is mainly limited by the electrochemical performance of the cathode, so it is necessary to develop an advanced cathode material. In this work, the N, B co-doped sodium alginate-based porous carbon (NBSPC) is prepared by one-step co-carbonization using sodium alginate as matrix and NH₄B₅O₈ as N and B sources. This N, B co-doping strategy can make the pore structure of porous carbon materials more reasonable and increase 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, NBSPC shows excellent rate performance (85.4 mA h g⁻¹ even at ultra-high current density of 40 A g⁻¹) and cycling stability (15000 cycles at 20 A g⁻¹ with a capacity retention rate of 94.5%).
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1. An illustration of the preparation of NBSPC

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Figure 1. (a-b) SEM images of NBSPC-4. (c-d) TEM images of NBSPC-4. (e-f) HRTEM images of NBSPC-4. (g) SAED patterns. (h-i) HAADF analysis and mapping

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Figure 2. (a) Nitrogen adsorption-desorption curves. (b) Pore size distribution. (c) Raman spectroscopy. (d) XRD diffraction curves. (e) FTIR spectrum. (f) XPS survey spectra

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Figure 3. Electrochemical performance of symmetric supercapacitor: (a) GCD curves. (b) CV curves. (c) Nyquist plots. (d) Specific capacitance at different current density. (e) GCD curves of NBSPC-4 at different current density. (f) CV curves of NBSPC-4 at different scan rates. (g) Cycling stability. (h) Energy density and power density

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Figure 4. Electrochemical performance of Zn-ion hybrid capacitor: (a) Schematic illustration of ZIHCs. (b) GCD curves. (c) CV curves. (d) Energy/power density comparison. (e) Nyquist plots. (f) Rate performance. (g) Cycling stability. (h) Comparison of energy density, power density, and cycling stability of NBSPC-4 and other types of advanced carbon materials

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Figure 5. (a) GCD curves at different current density of NBSPC-4. (b) CV curves at different scan rates of NBSPC-4. (c) b values. (d) Capacitive and diffusion-controlled contribution to Zn storage of NBSPC-4 at 10 mV s⁻¹. (e) Normalized contribution ratio of capacitive and diffusion-controlled capacities at different scan rates

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