混合催化剂辅助合成提取自山茶壳的多功能碳,用于高性能钠离子电池和钠离子混合电容器

Hanshu Mao, Sisi Yang, Yingjun Yang, Jinyue Yang, Guizhi Yuan, Mingtao Zheng, Hang Hu, Yeru Liang, Xiaoyuan Yu
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摘要

生物质衍生碳作为储能材料,因其低成本、可持续性和固有的结构优势而逐渐受到广泛关注。本文以山茶花壳为生物质前驱体,通过不同的处理方法合成了用于钠离子电池(SIB)、钠离子电容器(SIC)半电池和钠离子混合电容器(SIHC)的硬质碳(H-1200)和多孔碳(PC-800)。直接高温碳化合成的 H-1200 具有合理的石墨层结构和丰富的杂原子。将其用作 SIB 的阳极时,在 25 mA g-1 的条件下,其可逆容量为 365.5 mAh g-1,在 200 mA g-1 条件下循环 400 次后,容量保持率为 89.0%。此外,通过催化碳化 K2C2O4/CaC2O4 混合催化剂制备的 PC-800 具有复杂的多孔结构和 2186.9 平方米 g-1 的高表面积。将其用作 SIC 的阴极时,当电流为 100 mA g-1 时,最大容量为 104.2 mAh g-1;当电流为 5 A g-1 时,最大容量为 35.0 mAh g-1。此外,以 H-1200 为阳极、PC-800 为阴极的全碳组装 SIHC (H-1200||PC-800)具有输出电压范围宽(0.01 ~ 4.1 V)、能量密度高(161.5 Wh kg-1)、功率密度高(12896.1 W kg-1)以及在 10 A g-1 条件下循环 10000 次后容量保持率高(90.32%)等特点。这项研究成果为构建低成本、大规模生产生物质衍生碳储能材料开辟了新天地。
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Hybrid catalyst-assisted synthesis of multifunctional carbon derived from Camellia shell for high-performance sodium-ion batteries and sodium-ion hybrid capacitors

Biomass-derived carbon as energy storage materials have gradually attracted widespread attention due to their low cost, sustainability, and inherent structural advantages. Herein, hard carbon (H-1200) and porous carbon (PC-800) for sodium-ion batteries (SIBs), sodium-ion capacitors (SICs) half cells and sodium-ion hybrid capacitors (SIHCs) have been synthesized from the same biomass precursor of Camellia shells through different treatments. H-1200 synthesized by directly high-temperature carbonization possesses a rational graphitic layer structure and plentiful heteroatoms. When applied as anode for SIBs, it exhibits a reversible capacity of 365.5 mAh g–1 at 25 mA g–1 and capacity retention 89.0% after 400 cycles at 200 mA g–1. Additionally, PC-800 prepared by catalytic carbonization of K2C2O4/CaC2O4 hybrid catalyst has a sophisticated porous structure and a high surface area of 2186.9 m2 g–1. When employed as a cathode for SICs, it delivers a maximum capacity 104.2 mAh g–1 at 100 mA g–1 and 35.0 mAh g–1 at 5 A g–1. Furthermore, the all carbon assembled SIHC (H-1200||PC-800) using H-1200 as anode and PC-800 as cathode, features a broad output voltage range (0.01 ~ 4.1 V), high energy density of 161.5 Wh kg–1, power density of 12896.1 W kg–1, and superior capacity retention of 90.32% after 10000 cycles at 10 A g–1. This research result provide a new horizon for constructing low-cost and large-scale production of biomass derived carbon for energy storage materials.

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Issue Information Front Cover: Carbon Neutralization, Volume 3, Issue 6, November 2024 Inside Back Cover Image: Carbon Neutralization, Volume 3, Issue 6, November 2024 Back Cover Image: Carbon Neutralization, Volume 3, Issue 6, November 2024 A chronicle of titanium niobium oxide materials for high-performance lithium-ion batteries: From laboratory to industry
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