得益于丰富的钠资源和类似的插层化学性质,钠离子电池被认为是一种很有前途的锂离子电池替代者.生物质硬碳具有来源丰富、可再生的优点,是一种高性价比的阳极材料.本文采用简单两步法,机械球磨和炭化,将可再生甘蔗渣制备成硬碳材料.这种硬碳电极具有较高的可逆容量(315 mA?h/g),表现出优秀的电化学性能.此外,在全电池HC//NaMn0.4Ni0.4Ti0.1Mg0.1O2中的初始容量达253 mA?h/g,80次循环后容量仍有77％,进一步验证了其实际应用价值.简单、低成本的制备工艺以及优异的电化学性能表明,甘蔗渣硬碳是一种很有前途的钠离子电池负极材料.“,”Sodium-ion batteries are considered as a promising candidate for lithium-ion batteries due to abundant sodium resources and similar intercalation chemistry. Hard carbon derived from biomass with the virtue of abundance and renewability is a cost-effective anode material. Herein, hard carbon is derived from renewable bagasse through a simple two-step method combining mechanical ball milling with carbonization. The hard carbon electrodes exhibit superior electrochemical performance with a high reversible capacity of 315 mA?h/g. Furthermore, the initial capacity of the full cell, HC//NaMn0.4Ni0.4Ti0.1Mg0.1O2, is 253 mA?h/g and its capacity retention rate is 77％ after 80 cycles, which further verifies its practical application. The simple and low-cost preparation process, as well as excellent electrochemical properties, demonstrates that hard carbon derived from bagasse is a promising anode for sodium-ion batteries.