Sodium-ion battery hard charcoal prepared from trimmed waste apple branches and preparation method of sodium-ion battery hard charcoal

The invention belongs to the technical field of waste recycling and sodium-ion batteries, and relates to sodium-ion battery hard charcoal prepared by utilizing trimmed apple waste branches and a method, and the method comprises the following steps: 1) pretreating the trimmed apple waste branches to obtain a pre-carbonized product and dry distillation liquid; 2) heating, refluxing, calcining and washing the pre-carbonized product to obtain a hard carbon precursor; and 3) mixing the hard carbon precursor with an organic small molecule compound, calcining in an inert gas atmosphere, and cooling to obtain the sodium-ion battery hard carbon. The sodium-ion battery hard carbon prepared by the invention not only has very high specific capacity and very high first charge-discharge efficiency, but also realizes deep reutilization of trimmed apple waste branches. 本发明属于废弃物资源化以及钠离子电池技术领域，涉及一种利用苹果修剪废枝制备的钠离子电池硬炭及方法，包括：1)苹果修剪废枝经预处理得到预碳化产物和干馏液；2)预碳化产物通过加热回流、煅烧、洗涤得到硬炭前驱体；3)将硬炭前驱体与有机小分子化合物混合，在惰性气体氛围下煅烧、冷却得到钠离子电池硬炭。本发明制备的钠离子电池硬