当前位置：
X-MOL 学术
›
ACS Appl. Mater. Interfaces
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Effect of Binder Architecture on the Performance of Silicon/Graphite Composite Anodes for Lithium Ion Batteries
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-01-19 00:00:00 , DOI: 10.1021/acsami.7b13205 Peng-Fei Cao , Michael Naguib 1 , Zhijia Du , Eric Stacy , Bingrui Li , Tao Hong , Kunyue Xing , Dmitry N. Voylov , Jianlin Li , David L. Wood , Alexei P. Sokolov , Jagjit Nanda , Tomonori Saito
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-01-19 00:00:00 , DOI: 10.1021/acsami.7b13205 Peng-Fei Cao , Michael Naguib 1 , Zhijia Du , Eric Stacy , Bingrui Li , Tao Hong , Kunyue Xing , Dmitry N. Voylov , Jianlin Li , David L. Wood , Alexei P. Sokolov , Jagjit Nanda , Tomonori Saito
Affiliation
|
Although significant progress has been made in improving cycling performance of silicon-based electrodes, few studies have been performed on the architecture effect on polymer binder performance for lithium-ion batteries. A systematic study on the relationship between polymer architectures and binder performance is especially useful in designing synthetic polymer binders. Herein, a graft block copolymer with readily tunable architecture parameters is synthesized and tested as the polymer binder for the high-mass loading silicon (15 wt %)/graphite (73 wt %) composite electrode (active materials >2.5 mg/cm2). With the same chemical composition and functional group ratio, the graft block copolymer reveals improved cycling performance in both capacity retention (495 mAh/g vs 356 mAh/g at 100th cycle) and Coulombic efficiency (90.3% vs 88.1% at first cycle) than the physical mixing of glycol chitosan (GC) and lithium polyacrylate (LiPAA). Galvanostatic results also demonstrate the significant impacts of different architecture parameters of graft copolymers, including grafting density and side chain length, on their ultimate binder performance. By simply changing the side chain length of GC-g-LiPAA, the retaining delithiation capacity after 100 cycles varies from 347 mAh/g to 495 mAh/g.
中文翻译：
粘合剂结构对锂离子电池硅/石墨复合阳极性能的影响
尽管在改善硅基电极的循环性能方面已经取得了重大进展，但是关于锂离子电池的聚合物粘合剂性能对体系结构影响的研究很少。对聚合物结构与粘合剂性能之间关系的系统研究对设计合成聚合物粘合剂特别有用。本文中，合成了具有易于调整的结构参数的接枝嵌段共聚物，并作为高质量负载硅（15 wt％）/石墨（73 wt％）复合电极（活性材料> 2.5 mg / cm 2）的聚合物粘合剂进行了测试。）。在相同的化学组成和官能团比率的情况下，接枝嵌段共聚物的容量保持率（第100个循环时为495 mAh / g vs. 356 mAh / g）和库仑效率（第一个循环为90.3％vs 88.1％）均显示出改善的循环性能。乙二醇壳聚糖（GC）和聚丙烯丙烯酸锂（LiPAA）的物理混合。恒电流的结果还证明了接枝共聚物的不同结构参数（包括接枝密度和侧链长度）对其最终粘合剂性能的重大影响。通过简单地改变GC- g- LiPAA的侧链长度，在100次循环后保留的脱锂能力从347 mAh / g变为495 mAh / g。
更新日期：2018-01-19
中文翻译：
粘合剂结构对锂离子电池硅/石墨复合阳极性能的影响
尽管在改善硅基电极的循环性能方面已经取得了重大进展，但是关于锂离子电池的聚合物粘合剂性能对体系结构影响的研究很少。对聚合物结构与粘合剂性能之间关系的系统研究对设计合成聚合物粘合剂特别有用。本文中，合成了具有易于调整的结构参数的接枝嵌段共聚物，并作为高质量负载硅（15 wt％）/石墨（73 wt％）复合电极（活性材料> 2.5 mg / cm 2）的聚合物粘合剂进行了测试。）。在相同的化学组成和官能团比率的情况下，接枝嵌段共聚物的容量保持率（第100个循环时为495 mAh / g vs. 356 mAh / g）和库仑效率（第一个循环为90.3％vs 88.1％）均显示出改善的循环性能。乙二醇壳聚糖（GC）和聚丙烯丙烯酸锂（LiPAA）的物理混合。恒电流的结果还证明了接枝共聚物的不同结构参数（包括接枝密度和侧链长度）对其最终粘合剂性能的重大影响。通过简单地改变GC- g- LiPAA的侧链长度，在100次循环后保留的脱锂能力从347 mAh / g变为495 mAh / g。
京公网安备 11010802027423号