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当前传统涂布工艺制备的炭硅电极尤其依赖粘结剂和导电剂。这种依赖性导致存在界面接触不理想、电子传导路径不稳定以及活性物质质量负载率的提升受限等问题。针对上述问题，本实验以煤沥青作为炭前驱体原料，通过绿色的低共熔溶剂萃取出富含杂原子、分子量适中且结构可调的活性组分，从而获得了具有优异可加工性和可控炭化行为的理想炭前驱体溶液。进而，通过低温热解法制备了无需粘结剂和导电剂的一体化沥青基炭硅负极材料：SC@PC。SC@PC在 0.2 A·g-1电流密度下的首次放电容量高达 3423.16 mhA·g-1；在 2 A·g-1大电流密度下循环300次后仍然能保持 1855.90 mAh·g-1的可逆容量；在倍率性能方面，即使在高达 3 A·g-1 的电流密度下，仍能保持1592.10 mhA·g-1的超高可逆比容量。
Abstract：At present， the carbon-silicon electrodes prepared by traditional coating process especially rely on binders and conductive agents. This dependence leads to problems such as unsatisfactory interface contact， unstable electron conduction path， and limited improvement of mass loading rate of active substances. In view of the above problems， in this experiment， coal tar pitch was used as the raw material of carbon precursor， and the active components rich in heteroatoms， moderate molecular weight and adjustable structure were extracted by green deep eutectic solvent， so as to obtain an ideal carbon precursor solution with excellent processability and controllable carbonization behavior. Furthermore， an integrated pitch-based carbon-silicon anode material without binder and conductive agent was prepared by low-temperature pyrolysis : SC@PC. SC@PC exhibits an exceptional initial discharge capacity of 3423.16 mAh·g?1 at 0.2 A·g?1 and maintains a reversible capacity of 1855.90 mAh·g?1 after 300 cycles at 2 A·g?1. Furthermore， it demonstrates excellent rate performance， delivering 1592.10 mAh·g?1 even at a high current density of 3 A·g?1.
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基本信息:
中图分类号:TB332;TM912
引用信息:
[1]胡澜,岑厚桦,甘冰清,等.一体化沥青基炭硅负极材料的合成及电化学性能研究[J].炭素技术().
基金信息:
国家重点研发计划（2021YFA0715802）资助
2026-03-19
2026-03-19
2026-03-19