Issatayev Nurbolat, Kalimuldina Gulnur, Nurpeissova Arailym, Bakenov Zhumabay
National Laboratory Astana, Nazarbayev University, Kabanbay Batyr Ave. 53, Nur-Sultan 010000, Kazakhstan.
Department of Chemical and Materials Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Kabanbay Batyr Ave. 53, Nur-Sultan 010000, Kazakhstan.
Nanomaterials (Basel). 2021 Dec 22;12(1):22. doi: 10.3390/nano12010022.
New porous activated carbons with a high surface area as an anode material for lithium-ion batteries (LIBs) were synthesized by a one-step, sustainable, and environmentally friendly method. Four chemical activators-HSO, HPO, KOH, and ZnCl-have been investigated as facilitators of the formation of the porous structure of activated carbon (AC) from an agar precursor. The study of the materials by Brunauer-Emmett-Teller (BET) and scanning electron microscopy (SEM) methods revealed its highly porous meso- and macro-structure. Among the used chemical activators, the AC prepared with the addition of KOH demonstrated the best electrochemical performance upon its reaction with lithium metal. The initial discharge capacity reached 931 mAh g and a reversible capacity of 320 mAh g was maintained over 100 cycles at 0.1 C. High rate cycling tests up to 10 C demonstrated stable cycling performance of the AC from agar.
采用一步法、可持续且环境友好的方法合成了具有高比表面积的新型多孔活性炭，用作锂离子电池（LIBs）的负极材料。研究了四种化学活化剂——硫酸（HSO）、磷酸（HPO）、氢氧化钾（KOH）和氯化锌（ZnCl）——作为从琼脂前驱体制备活性炭（AC）多孔结构的促进剂。通过布鲁诺尔-埃米特-泰勒（BET）法和扫描电子显微镜（SEM）对材料进行研究，揭示了其高度多孔的介观和宏观结构。在所使用的化学活化剂中，添加KOH制备的AC与锂金属反应时表现出最佳的电化学性能。初始放电容量达到931 mAh/g，在0.1 C下100次循环后可逆容量保持在320 mAh/g。高达10 C的高倍率循环测试表明，琼脂基AC具有稳定的循环性能。
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