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Highly Elastic Binder for Improved Cyclability of Nickel‐Rich Layered Cathode Materials in Lithium‐Ion Batteries
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2020-06-22 , DOI: 10.1002/aenm.202001069 Barsa Chang 1 , Jaemin Kim 1 , Yunshik Cho 1 , Insu Hwang 1 , Min Soo Jung 1 , Kookheon Char 1 , Kyu Tae Lee 1 , Ki Jae Kim 2 , Jang Wook Choi 1
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2020-06-22 , DOI: 10.1002/aenm.202001069 Barsa Chang 1 , Jaemin Kim 1 , Yunshik Cho 1 , Insu Hwang 1 , Min Soo Jung 1 , Kookheon Char 1 , Kyu Tae Lee 1 , Ki Jae Kim 2 , Jang Wook Choi 1
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Nickel‐rich layered cathode materials are predominantly used for lithium‐ion batteries intended for electric vehicles owing to their high specific capacities and minimal use of high‐cost cobalt. The intrinsic drawbacks of nickel‐rich layered cathode materials with regard to cycle life and safety have largely been addressed by doping and by applying surface coatings. Here, it is reported that a highly elastic binder, namely spandex, can overcome the problems of nickel‐rich layered cathode materials and improve their electrochemical properties drastically. The high elasticity of spandex allows it to uniformly coat LiNi0.8Co0.1Mn0.1O2 particles via shear force during slurry mixing to protect the particles from undesired interfacial reactions during cycling. The uniform coating of spandex, together with its hydrogen bonding interaction with LiNi0.8Co0.1Mn0.1O2, leads to enhanced particle‐to‐particle interaction, which has multiple advantages, such as high loading capability, superior rate and cycling performance, and low binder content. This study highlights the promise of elastic binders to meet the ever‐challenging criteria with respect to nickel‐rich cathode materials in cells targeting electric vehicles.
中文翻译：
高弹性粘合剂，可改善锂离子电池中富镍层状正极材料的循环性
富镍层状阴极材料主要用于电动汽车用锂离子电池，这是因为它们具有高的比容量和极少使用的高价钴。富镍层状阴极材料在循环寿命和安全性方面的固有缺点已在很大程度上通过掺杂和施加表面涂层得以解决。在这里，据报道，一种高弹性的粘合剂，即斯潘德克斯弹性纤维，可以克服富镍层状阴极材料的问题，并大大改善其电化学性能。氨纶的高弹性使其可以均匀地涂覆LiNi 0.8 Co 0.1 Mn 0.1 O 2在浆液混合过程中通过剪切力作用保护颗粒，以防止颗粒在循环过程中发生不良界面反应。斯潘德克斯弹性纤维的均匀涂层及其与LiNi 0.8 Co 0.1 Mn 0.1 O 2的氢键键合相互作用，增强了颗粒间的相互作用，具有多重优势，例如高负载能力，优异的速率和循环性能，以及粘合剂含量低。这项研究突显了弹性粘合剂有望满足针对电动汽车电池中富镍阴极材料方面不断挑战的标准。
更新日期：2020-08-04
中文翻译：
高弹性粘合剂，可改善锂离子电池中富镍层状正极材料的循环性
富镍层状阴极材料主要用于电动汽车用锂离子电池，这是因为它们具有高的比容量和极少使用的高价钴。富镍层状阴极材料在循环寿命和安全性方面的固有缺点已在很大程度上通过掺杂和施加表面涂层得以解决。在这里，据报道，一种高弹性的粘合剂，即斯潘德克斯弹性纤维，可以克服富镍层状阴极材料的问题，并大大改善其电化学性能。氨纶的高弹性使其可以均匀地涂覆LiNi 0.8 Co 0.1 Mn 0.1 O 2在浆液混合过程中通过剪切力作用保护颗粒，以防止颗粒在循环过程中发生不良界面反应。斯潘德克斯弹性纤维的均匀涂层及其与LiNi 0.8 Co 0.1 Mn 0.1 O 2的氢键键合相互作用，增强了颗粒间的相互作用，具有多重优势，例如高负载能力，优异的速率和循环性能，以及粘合剂含量低。这项研究突显了弹性粘合剂有望满足针对电动汽车电池中富镍阴极材料方面不断挑战的标准。
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