石墨质多孔炭的制备及其双离子电容储能机理

展长振; 曾晓婕; 吕瑞涛; 沈洋; 黄正宏; 康飞宇

doi:10.1016/S1872-5805(23)60727-9

石墨质多孔炭的制备及其双离子电容储能机理

doi: 10.1016/S1872-5805(23)60727-9

展长振^{1, 3,},
曾晓婕²,
吕瑞涛^{1, 2},
沈洋¹,
黄正宏^{1, 2, ,},
康飞宇^{1, 2}

1.
清华大学材料学院新型陶瓷与精细工艺国家重点实验室，北京 100084
2.
清华大学材料学院先进材料教育部重点实验室，北京 100084
3.
北京蒙京石墨新材料科技研究院有限公司，北京 101318

详细信息

作者简介:
展长振，博士. E-mail：zhanchangzhen@sina.com

通讯作者:
黄正宏，博士，教授. E-mail：zhhuang@tsinghua.edu.cn

中图分类号: TQ127.1⁺1
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- 被引次数: 0
出版历程
- 收稿日期: 2019-04-26
- 修回日期: 2022-10-25
- 网络出版日期: 2023-03-01
- 刊出日期: 2023-06-01

Preparation of porous graphitic carbon and its dual-ion capacitance energy storage mechanism

ZHAN Chang-zhen^{1, 3
,},
ZENG Xiao-jie²,
LV Rui-tao^{1, 2},
SHEN Yang¹,
HUANG Zheng-hong^{1, 2
, ,},
KANG Fei-yu^{1, 2}

1.
State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
2.
Key Lab of Advanced Materials, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
3.
Mengjing Advanced Graphite Institute, Beijing 101318, China

More Information

Author Bio:
ZHAN Chang-zhen, Ph.D. E-mail: zhanchangzhen@sina.com

Corresponding author: HUANG Zheng-hong, Ph.D, Professor. E-mail: zhhuang@tsinghua.edu.cn

摘要

摘要: 作为锂离子电池和超级电容器的结合，锂离子电容器由于兼备电池和电容器的优点而受到了广泛关注。然而因其正极双电层电容行为的储能机理，锂离子电容器的能量特性受到了较大的限制。因此，为了从根本上增强锂离子电容器正极材料性能，本研究提出了双离子电容器的储能机理。以柠檬酸钾/镁/铁为原料，合成了兼备石墨质结构与层次化多孔结构的石墨质多孔炭，并以其为正极材料，实现了兼具锂离子电容器正极离子吸附行为与双离子电池正极阴离子插层行为的双离子电容储能。由于石墨质多孔炭结构中石墨质结构在高电位下由阴离子插层反应贡献的额外平台容量以及对于材料导电性的增强，石墨质多孔炭正极材料的能量特性明显超过多孔炭及人造石墨正极，实现了从储能机理的层面的器件性能增强。
- 双离子电容 /
- 石墨质多孔炭 /
- 锂离子电容器 /
- 双离子电池 /
- 柠檬酸盐
Abstract: A lithium-ion capacitor, a combination of a lithium-ion batteries and a supercapacitor, is expected to have the advantages of both a batteries and a capacitor and has attracted worldwide attention in recent years. However, its energy storage is limited due to the electric double-layer capacitance mechanism of the positive electrode. Consequently, to fundamentally improve the performance of the positive electrode material, a novel dual-ion hybrid capacitance energy storage mechanism is proposed. Porous graphitic carbon with a partially graphitized structure and hierarchical porous structure was synthesized by a one-step heat treatment method using potassium/magnesium/iron citrate as precursors. When used as the positive electrode material, the porous graphitic carbon has a dual-ion hybrid capacitance mechanism in an electrolyte produced using a mixture of Li-TFSI (bis(trifluoromethylsulfonyl) amine lithium salt) and BMIm-TFSI (1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide), which combines electric double-layer capacitance behavior in a lithium-ion capacitor and anion intercalation/de-intercalation behavior in a dual-ion batteries. Two mechanisms were observed in the electrochemical characterization process, and the performance of the porous graphitic carbon was compared to porous carbon and artificial graphite, which indicate that its energy storage performance is significantly better due to the additional plateau capacity contributed by anion intercalation at a high potential and the improved conductivity through the local graphitic regions.
- Dual-ion hybrid capacitor /
- Porous graphitic carbon /
- Lithium-ion battery /
- Dual-ion battery /
- Citrate

HTML全文

FIG. 2369. FIG. 2369.

FIG. 2369.. FIG. 2369.

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图 1 （a） PC-K与（b） PC-Mg的SEM照片

Figure 1. SEM images of (a) PC-K and (b) PC-Mg

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图 2 PC-K与PC-Mg样品的（a）氮气吸附/脱附等温线及（b）对应的孔径分布

Figure 2. (a) N₂ adsorption/desorption isotherms and (b) the corresponding pore-size distributions of PC-K and PC-Mg

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图 3 （a） PC-KMg与（b） Citrate-PGC的TEM照片

Figure 3. TEM images of (a) PC-KMg and (b) Citrate-PGC

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图 4 （a） PC-KMg与（b） Citrate-PGC的X射线衍射图谱

Figure 4. XRD patterns of (a) as-prepared PC-KMg and (b) Citrate-PGC

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图 5 PC-KMg与Citrate-PGC的氮气吸附/脱附等温线

Figure 5. N₂ adsorption/desorption isotherms of PC-KMg and Citrate-PGC

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图 6 Citrate-PGC样品的孔径分布

Figure 6. Pore-size distributions of Citrate-PGC

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图 7 正极材料的（a）恒流充放电曲线及（b）循环伏安曲线

Figure 7. (a) Galvanostatic charge/discharge and (b) cyclic voltammetry curves of the positive electrode materials

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图 8 正极材料的恒流放电曲线及能量特性

Figure 8. Galvanostatic discharge curves and energy performance of the positive electrode materials

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