A novel slurry concept for the fabrication of lithium-ion battery electrodes with beneficial properties
A novel slurry concept for the fabrication of lithium-ion battery electrodes with beneficial properties
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DOI：
10.1016/j.jpowsour.2014.04.115
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发表时间：
2014-11-01
影响因子：
9.2
通讯作者：
Willenbacher, Norbert
中科院分区：
文献类型：
--
作者：
Bitsch, Boris;Dittmann, Jens;Willenbacher, Norbert
提出了一种新的浆料概念，用于制造锂离子电池电极，重点是水基配方。利用毛细管力，通过加入一小部分与体连续相不混相的第二流体，低剪切粘度可以在很宽的范围内变化，而不需要传统的聚合物流变控制剂干扰干电极的电性能。新浆料提供了卓越的储存稳定性和优异的形状精度的最终干膜。这减少了边缘的浪费切断，增加了活性成分的密度，从而提高了成本效益。高剪切速率下的粘度不受影响，因此浆料可以使用既定的设备和工艺参数进行加工和涂覆。与导体箔的粘附性以及电极层和相应电池的电化学性能与由传统浆料制成的类似。(C) 2014 Elsevier B.V.版权所有
A novel slurry concept for the fabrication of Li-ion battery electrodes focusing on water based formulations is presented. Taking advantage of capillary forces inferred by adding a small fraction of a second fluid immiscible with the bulk continuous phase the low shear viscosity can be varied in a wide range without conventional polymeric rheology control agents disturbing the electric properties of the dry electrode. The new slurries provide superior storage stability and excellent shape accuracy of the final dry film. This reduces waste cut-off at the edges and increases the density of active ingredients, thus improving cost-efficiency. The viscosity at high shear rates remains unaffected, thus the slurries can be processed and coated using established equipment and process parameters. Adhesion to the conductor foil and electrochemical properties of the electrode layers and corresponding cells are similar to those made from conventional slurries. (C) 2014 Elsevier B.V. All rights reserved.