He Xing, Zhong Lei, Qiu Xueqing, Wen Fuwang, Sun Shirong, Zu Xihong, Zhang Wenli
Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, School of Chemical Engineering and Light Industry, Guangdong University of Technology (GDUT), 100 Waihuan Xi Road, Panyu District, Guangzhou, 510006, P.R. China.
Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory (Rongjiang Laboratory), Jieyang, 515200, P.R. China.
ChemSusChem. 2023 Oct 6;16(19):e202300646. doi: 10.1002/cssc.202300646. Epub 2023 Jul 28.
Soft carbon is a promising anode material for potassium-ion batteries due to its favorable properties such as low cost, high conductivity, stable capacity, and low potential platform. Polyvinyl chloride, as a white pollutant, is a soft carbon precursor that can be carbonized at varying temperatures to produce soft carbons with controllable defect and crystal structures. This work investigates the effect of carbonization temperature on the crystalline structures of the obtained soft carbons. In situ Raman spectroscopy was used to elucidate the adsorption-intercalation charge storage mechanism of potassium ions in soft carbons. Soft carbons prepared at the temperature of 800 °C have a defect-rich, short-range ordered structure, which provides optimal intercalation and adsorption sites for potassium ions, resulting in a satisfactory capacity of 302 mAh g . This work presents new possibilities for designing soft carbon materials from recycling plastics for potassium-ion batteries.
软碳因其低成本、高导电性、稳定容量和低电位平台等优良特性，是一种很有前景的钾离子电池负极材料。聚氯乙烯作为一种白色污染物，是一种软碳前驱体，可在不同温度下碳化以制备具有可控缺陷和晶体结构的软碳。本工作研究了碳化温度对所得软碳晶体结构的影响。采用原位拉曼光谱来阐明钾离子在软碳中的吸附-嵌入电荷存储机制。在800 °C温度下制备的软碳具有富含缺陷的短程有序结构，为钾离子提供了最佳的嵌入和吸附位点，从而产生了302 mAh g的令人满意的容量。这项工作为从回收塑料设计用于钾离子电池的软碳材料提供了新的可能性。
