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Sodium-ion batteries: Chemistry of biomass derived disordered carbon in carbonate and ether-based electrolytes
Electrochimica Acta ( IF 6.6 ) Pub Date : 2022-06-18 , DOI: 10.1016/j.electacta.2022.140744
K Bhawana , Amlan Roy , Nilanjan Chakrabarty , Manoj Gautam , Dimple P. Dutta , Sagar Mitra

Lightweight and low temperature processing carbon material as an anode are of attraction in upcoming sodium battery technology. Biomass is a natural resource and converting them to hard carbons (HC) is well known for their application as anode material. It favour's the cost and performance proposition in battery technology, however, suffers many fundamental problems like irreversible loss of sodium-ions in the first cycle, long-life stabilization, and quantification of defects on the carbon and electrochemical property correlation, etc. Many such factors are notably dependent on the electrolyte used, defects in hard carbons, so in consideration of that, the focus of our research is to spotlight this by studying the electrochemistry of biomass-derived carbon anode in two different electrolyte solvent systems namely, Carbonate-based(CB) and Ether-based(EB) electrolytes. The results obtained here suggest that the EB electrolyte is more efficient compared to the CB electrolyte and that the creation of a thin and homogenous SEI layer increased reversibility and storage performance. Further, a full-cell has been fabricated using our biomass-derived carbon anode against a known [Na3V2(PO4)3 (NVP)] sodium vanadium phosphate in the role of cathode with the optimized EB as an electrolyte and electrochemical performance has also been documented.



中文翻译:

钠离子电池:碳酸盐和醚基电解质中生物质衍生无序碳的化学

作为阳极的轻质和低温加工碳材料在即将到来的钠电池技术中具有吸引力。生物质是一种自然资源,将它们转化为硬碳 (HC) 因其作为阳极材料的应用而广为人知。它有利于电池技术的成本和性能主张,然而,它存在许多基本问题,例如在第一次循环中钠离子的不可逆损失、长寿命稳定性以及碳和电化学性能相关性缺陷的量化等。许多这样的因素主要取决于所使用的电解质,硬碳的缺陷,因此考虑到这一点,我们的研究重点是通过研究生物质衍生碳阳极在两种不同电解质溶剂体系中的电化学来突出这一点,即,碳酸盐基 (CB) 和醚基 (EB) 电解质。此处获得的结果表明,与 CB 电解质相比,EB 电解质更有效,并且薄而均匀的 SEI 层的产生提高了可逆性和存储性能。此外,使用我们的生物质衍生碳阳极针对已知的 [Na3 V 2 (PO 4 ) 3 (NVP)] 磷酸钒钠在阴极的作用以及优化的 EB 作为电解质和电化学性能也已被证明。

更新日期:2022-06-22
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