LFP Battery Electrode Additives for Adhesion Improvement, leading to a higher energy density

LFP batteries’ trend is to get a higher charge/discharge rate and better electrochemical performance. To realise this, smaller particles and distribution are applied.  These request more adhesion points or areas. However, PVDF is a crystalized polymer, some sole binding points will be generated after drying the electrode, which is leading a lower adhesion.  The adhesion will become lower when using more PVDF in such case.

To avoid this problem, PAN was introduced accordingly. A linear PAN generates a second network for a good binding. It is a binder to improve the adhesion in the binding system by replacing some PVDF.

The carboxyl group in PAN is able to improve the binding between LFP layer and Aluminium foils.

The PAN binder also improves the wettability of aluminium foils, which improves the adhesion between LFP layer and aluminium foil.

  1. Adhesion proved to be improved when keeping the same amount of inactive binder in total, or
  2. Use less amount of inactive binders to get the same adhesion, and leave more space for active LFP to get a higher energy density
  1. Higher adhesion between the LFP layer and substrate
  2. Higher toughness in electrode
  3. Better thermal stability, without deposition under 200 degrees Celsius
  4. Better electrochemical stability, without disorder peak between 2V and 5V
  5. Stable rheology of slurry when applying
  6. Less dosage of binder when applying to get the same adhesion
  7. Easy to ship since it is a powder

Improve the adhesion between the LFP layer and substrate

Improve the cohesion between LFP particles

Reduce the dosage of binders

Linear PAN to generate a second network for PVDF particles, which avoids the decreasing of adhesion caused by the crystalized PVDF particles.

LFP Battery Electrode Additives for Anti-cracking of Thick Coatings

A binder with improved mechanical properties and flexibility to withstand stress during drying and cycling.