摘要：【中文】本发明公开了一种负极粘结剂，由以下方法制备而成：将瓜尔豆胶混合溶液与功能单体混合搅拌后置于γ射线下进行辐照，对辐照所得产物洗涤后即可得到所述负极粘结剂；其中，所述瓜尔豆胶混合溶液按以下步骤制作而成：首先将瓜尔豆胶溶于乙醇溶液中进行分散，得到瓜尔豆胶分散液；向瓜尔豆胶分散液中加入纤维素醚，在40～60℃反应30～60min，即可得到瓜尔豆胶混合溶液。本发明先通过纤维素醚对瓜尔豆胶进行预处理，再通过辐照进行改性，使瓜尔豆胶的粘结性能最大化，在制备极片过程使用真空处理，以解决硅的体积膨胀效应，由此提高负负极片的循环性能，且使锂离子电池的库伦效率有明显地提升。 【EN】The invention discloses a negative electrode binder which is prepared by the following method: mixing and stirring the guar gum mixed solution and the functional monomer, then placing the mixture under gamma rays for irradiation, and washing a product obtained by irradiation to obtain the cathode binder; the guar gum mixed solution is prepared by the following steps: firstly, dissolving guar gum in an ethanol solution for dispersion to obtain a guar gum dispersion liquid; and adding cellulose ether into the guar gum dispersion liquid, and reacting at 40-60 ℃ for 30-60 min to obtain the guar gum mixed solution. According to the invention, the guar gum is pretreated by the cellulose ether, and then is modified by irradiation, so that the bonding property of the guar gum is maximized, and the vacuum treatment is used in the process of preparing the pole piece so as to solve the volume expansion effect of silicon, thereby improving the cycle performance of the negative pole piece and obviously improving the coulomb efficiency of the lithium ion battery.