In this study, Si-alloy, lithium secondary battery’s anode, is the active material.
Water-based binder and D.I Water are the solvents. When making anode slurry under these conditions, the experience verified slurry’s dispersibility with addition
of Hydroxypropyl Cellulose(HPC) and Carboxyl branched ...
In this study, Si-alloy, lithium secondary battery’s anode, is the active material.
Water-based binder and D.I Water are the solvents. When making anode slurry under these conditions, the experience verified slurry’s dispersibility with addition
of Hydroxypropyl Cellulose(HPC) and Carboxyl branched dispersant.
After examination of the solidified electrode material’s precipitation rate and particle’s size, the solidified electrode material’s precipitation rate and cohesion improved with the addition of dispersant. Observation of slurry’s Heology and dispersion transition through FOG(Fineness Of Grind), Viscocity and TURBISCAN revealed that dispersants maintained dispersion’s stability on slurry.
For the confirmation of electrode’s uniform diffusion, I used the observation of electrode’s surface with SEM and it showed that surface with dispersant was more even. When examining TEM with the addition of 0.7wt.% HPC, active material’s surface had Ketjen black more evenly spread. When manufactured electrode had taping test to see its adhesion, both evenly spread and adhesion improved.
I made battery to test electrochemical characteristics. Regarding initial discharge capacity, polarization resistance and cycling performances, the characteristics
were enhanced the most when HPC 0.7wt.% was added. For this reason, the cause of the cohesion, Ketjen black spread evenly and was considered as an improvement
in conductivity. However, when Carboxyl branched dispersants were added, all the electrochemical characteristics had fracture. Especially cycle’s qualities have significantly fell. This phenomenon has been compared with CV and volume of charged and discharged, anion surface active agent-Carboxyl branched dispersants.
When a cycle’s exhausted and was compared with the electrode’s surface, electrode’s surface without dispersants was in a worse condition. Electrode’s expansion rate has reduced. This is because adding dispersant has improved cohesion and as binder on particle’s surface is evenly dispersed, the adhesion
improved. In case of HPC especially, it services as a binder and that’s why the characteristics have been enhanced.
In this study, Si-alloy, lithium secondary battery’s anode, is the active material.
Water-based binder and D.I Water are the solvents. When making anode slurry under these conditions, the experience verified slurry’s dispersibility with addition
of Hydroxypropyl Cellulose(HPC) and Carboxyl branched dispersant.
After examination of the solidified electrode material’s precipitation rate and particle’s size, the solidified electrode material’s precipitation rate and cohesion improved with the addition of dispersant. Observation of slurry’s Heology and dispersion transition through FOG(Fineness Of Grind), Viscocity and TURBISCAN revealed that dispersants maintained dispersion’s stability on slurry.
For the confirmation of electrode’s uniform diffusion, I used the observation of electrode’s surface with SEM and it showed that surface with dispersant was more even. When examining TEM with the addition of 0.7wt.% HPC, active material’s surface had Ketjen black more evenly spread. When manufactured electrode had taping test to see its adhesion, both evenly spread and adhesion improved.
I made battery to test electrochemical characteristics. Regarding initial discharge capacity, polarization resistance and cycling performances, the characteristics
were enhanced the most when HPC 0.7wt.% was added. For this reason, the cause of the cohesion, Ketjen black spread evenly and was considered as an improvement
in conductivity. However, when Carboxyl branched dispersants were added, all the electrochemical characteristics had fracture. Especially cycle’s qualities have significantly fell. This phenomenon has been compared with CV and volume of charged and discharged, anion surface active agent-Carboxyl branched dispersants.
When a cycle’s exhausted and was compared with the electrode’s surface, electrode’s surface without dispersants was in a worse condition. Electrode’s expansion rate has reduced. This is because adding dispersant has improved cohesion and as binder on particle’s surface is evenly dispersed, the adhesion
improved. In case of HPC especially, it services as a binder and that’s why the characteristics have been enhanced.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.