Insight into the effect of structural differences among pitch fractions on sodium storage performance of pitch-derived hard carbons

Zhang, Xufeng; Yi, Zonglin; Tian, Yanru; Xie, Lijing; Su, Fangyuan; Wei, Xianxian; Chen, Jingpeng; Chen, Cheng-Meng

doi:10.1016/j.carbon.2024.119165

Carbon

2024

DOI: 10.1016/j.carbon.2024.119165

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Insight into the effect of structural differences among pitch fractions on sodium storage performance of pitch-derived hard carbons

Xufeng Zhang,

Zonglin Yi,

Yanru Tian

et al.

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Cited by 8 publications

References 49 publications

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Uncovering the Salt‐Controlled Porosity Regulation in Coal‐Derived Hard Carbons for Sodium Energy Storage

Wu,

Yin,

Liu

et al. 2024

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Coal is a promising precursor of hard carbon (HC) anodes for sodium‐ion batteries (SIBs), by virtue of resource abundance, low cost, and high product yield. However, the concomitant inorganic salt is usually recognized as impurities and plays an obscure and even contradictory effect on the regulation of pore structure in HCs. Herein, a two‐step pyrolysis procedure to the representative salty coal is performed, in which the acid washing program is selectively inserted. It is illuminated that salt acts as a template or activating agent for the generation of open pores at low temperatures but inhibits the closure of pores during the following high‐temperature carbonization. The optimized HC delivers a reversible capacity of 322.4 mAh g−1, a high plateau capacity of 192 mAh g−1, and an initial coulombic efficiency of 80%, outperforming to most coal‐based HCs. Assembled with an NVPOF cathode, the full‐cell exhibits a high energy density of 284.7 Wh kg−1. This work not only provides a systematic understanding of salt‐dependent pore structure modulation but also practices a simple, cost‐effective, and potentially scalable technique for the production of coal‐based HCs.

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Uncovering the Salt‐Controlled Porosity Regulation in Coal‐Derived Hard Carbons for Sodium Energy Storage

Wu,

Yin,

Liu

et al. 2024

Small

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Pyrrolic and pyridinic nitrogen-rich carbon microspheres derived from polydopamine as advanced anodes for sodium ion batteries

Tao,

Huang,

Zeng

et al. 2025

Carbon

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Overview of electrochemical competing process of sodium storage and metal plating in hard carbon anode of sodium ion battery

Zhou,

Song,

Zhang

et al. 2024

Energy Storage Materials

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Insight into the effect of structural differences among pitch fractions on sodium storage performance of pitch-derived hard carbons

Cited by 8 publications

References 49 publications

Uncovering the Salt‐Controlled Porosity Regulation in Coal‐Derived Hard Carbons for Sodium Energy Storage

Uncovering the Salt‐Controlled Porosity Regulation in Coal‐Derived Hard Carbons for Sodium Energy Storage

Pyrrolic and pyridinic nitrogen-rich carbon microspheres derived from polydopamine as advanced anodes for sodium ion batteries

Overview of electrochemical competing process of sodium storage and metal plating in hard carbon anode of sodium ion battery

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