Due to the well-balanced and synergistic advantageous features, the co-utilization of silicon (Si) and graphite (Gr) particles is hailed as enabling substitute to all-Gr and all–Si anodes for lithium-ion batteries (LIBs). The effect of Si to Gr and lithium poly(acrylic acid) (LiPAA) to sodium carboxymethyl cellulose (CMC) ratio on the electrochemistry and performance of Si-Gr composite (blended) anode based LIB cells is investigated. Besides regulating the ratio of Si to Gr active materials in the Si-Gr blend, it is found that the use of a mixture of polymeric binders and their optimization is of supreme importance. Thus, the co-use and appropriate dose optimization of LiPAA and CMC with specific compatibility to Si and Gr respectively, are evaluated. Among tested various ratios, a blend anode with 20 wt% Si and LiPAA to CMC ratio of 2.27:7.73 resulted in high performing half and full cells based on NMC622 cathode, in terms of cycle life, capacity retention, and coulombic efficiency. The systematic investigation approach implemented in this work presents to be of significant importance to enable the practical deployment of silicon-graphite blend anode based LIBs.

由于具有良好的平衡和协同优势，硅（Si）和石墨（Gr）颗粒的共同利用被誉为能够替代锂离子电池（LIB）的全锗和全硅阳极。研究了Si对Gr和聚丙烯酸锂（LiPAA）与羧甲基纤维素钠（CMC）的比例对Si-Gr复合（共混）阳极LIB电池电化学性能的影响。除了调节Si-Gr共混物中Si与Gr活性材料的比例之外，还发现使用聚合物粘合剂的混合物及其优化是极为重要的。因此，评估了分别与Si和Gr具有特定相容性的LiPAA和CMC的共同使用和适当的剂量优化。在测试的各种比例中，具有20 wt％Si和LiPAA与CMC的比例为2.27：7的混合阳极。73在循环寿命，容量保持率和库仑效率方面，基于NMC622阴极产生了高性能的半电池和全电池。在这项工作中实施的系统调查方法对实现基于硅-石墨混合阳极的LIB的实际部署具有重要意义。