Facile Synthesis of N,P-codoped Hard Carbon Nanoporous Microspheres from Lignin for High-Performance Anodes of Sodium-Ion Batteries,ChemElectroChem

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Facile Synthesis of N,P-codoped Hard Carbon Nanoporous Microspheres from Lignin for High-Performance Anodes of Sodium-Ion Batteries
ChemElectroChem ( IF 3.5 ) Pub Date : 2021-08-20 , DOI: 10.1002/celc.202100795
Jie Zhang ₁ , Jingying Duan ₁ , Yang Zhang ₁ , Mingming Chen ₁ , Kemeng Ji ₁ , Chengyang Wang ₂

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We demonstrate a facile emulsion-solvent evaporation process to easily convert lignin into nanoporous N,P-codoped hard carbon microspheres. The combined physiochemical characterizations indicate this material possesses micro-structure suitable for electrochemical energy storage. The electrochemical measurements of sodium ion battery (SIB) show that such lignin-derived carbon microspheres also follow the widely-accepted adsorption-intercalation Na-storage mechanism. The Na⁺ diffusion coefficient in as-obtained electrode could reach 10⁻⁹ cm² s⁻¹. They exhibit quite excellent and balanced Na-storage performances, such as large reversible and low-voltage capacity (up to 307–336 and 229–246 mAh g⁻¹, respectively), high initial coulombic efficiency (78.7–82.4 %), and good rate performance as well as long cycling stability (e. g., retaining at 248 mAh g⁻¹ and a retention of ∼92.2 % after running at 0.1 A g⁻¹ for 200 cycles). Consequently, this work not only provides a facile approach to realize high added-value utilization of lignin but also contributes to the development of eco-environmental batteries using low-cost materials.

中文翻译：

以木质素为原料合成 N,P 共掺杂硬碳纳米多孔微球，用于高性能钠离子电池负极

我们展示了一种简便的乳液溶剂蒸发工艺，可轻松将木质素转化为纳米多孔 N,P 共掺杂硬碳微球。综合理化特性表明该材料具有适合电化学储能的微观结构。钠离子电池（SIB）的电化学测量表明，这种木质素衍生的碳微球也遵循广泛接受的吸附-插层储钠机制。在所获得的电极中Na ⁺扩散系数可以达到10 ^-9 cm ² s ^-1。它们表现出非常出色和平衡的钠存储性能，例如大的可逆和低电压容量（高达 307-336 和 229-246 mAh g ^-1、高初始库仑效率（78.7-82.4 %）、良好的倍率性能以及长循环稳定性（例如，保持在 248 mAh g ^-1和在 0.1 A g ^{-1 下}运行后保持约 92.2 % 200 个循环）。因此，这项工作不仅为实现木质素的高附加值利用提供了一种简便的方法，而且有助于开发使用低成本材料的生态环境电池。

更新日期：2021-09-16

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