Abstract
In this work, an innovative method is proposed during electrode fabrication to improve Lithium ion batteries (LIBs) performance. Conventional electrodes are fabricated using tape-casting, which produces a randomly mixed particle network during casting. Because the particles are randomly placed, the performances of LIBs can be limited due to interferences in Li ion transport caused by bottles and discontinuities in the diffusion path. To address this issue, one possible solution is through electrode micro-structure modification is required to improve electrode performance. It is known that particles tend to form “pearl chains” under the influence of electric field (EF) due to the dipolar interactions between particles. This work investigates the potential of a unique and facile method that applies an EF combined with conventional tape-casting to further improve electrode performance via microstructure modification. We found that the electric field treatment combined with conventional tape-casting can improve battery performance easily and without the need for complex procedures. An analysis considering particle size, slurry rheology, and resulting microstructure was conducted to reveal insight on how the EF could produce the observed improved performance.
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