阳极
材料科学
多孔性
化学工程
木质素
碳纤维
离子
兴奋剂
聚合物
纳米技术
化学
有机化学
电极
复合材料
复合数
物理化学
工程类
光电子学
作者
Wen Luo,Qi He,Chaoqun Zhang,Zhenyu Jiang,Yi Cheng,Haisong Wang
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2024-02-06
卷期号:12 (7): 2881-2892
被引量:7
标识
DOI:10.1021/acssuschemeng.3c08045
摘要
The commercial graphitic anode with low specific capacity and serious lithium dendrite growth has limited further improvements of Li-ion batteries (LIBs). Here, we report a hierarchical porous hard carbon with N, S codoping (LSCF) that is synthesized using trifunctional sodium lignosulfonate (LS) from the pulp waste as the self-sacrificing template, carbon source, sulfur source, and natural chitosan as both the carbon source and nitrogen source. The strong hydrogen-bond interaction between the LS and chitosan enabled the robust stability of the carbon framework. And the self-template of sulfates and carbonates from LS enabled the formation of the hierarchical porous structure. First-principles calculations indicate that the hierarchical porous LSCF carbon with heteroatom doping has a lower diffusion barrier of Li+ and a higher electron conductivity. As an anode for LIBs, the LSCF delivers the specific capacity of 350 mAh g–1 at 100 mA g–1 with 85% retention after 1000 cycles. This work offers a one-step and low-cost method to fabricate the porous hard carbon anode for LIBs with dual-atom doping based on green natural polymers.
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