Prussian Blue Nanolayer-Embedded Separator for Selective Segregation of Nickel Dissolution in High Nickel Cathodes.
Changhyun ParkMin-Ho KimSangho KoChanhee LeeAhreum ChoiTaewon KimJinwoo ParkDong Woog LeeSeok Woo LeeHyun-Wook LeePublished in: Nano letters (2021)
Transition metal layered oxides (LiNi x Co y Mn 1- x - y O 2 , NCM) have been considered as one of the most promising cathodes for lithium-ion batteries used in long-mileage electric vehicles and energy storage systems. Despite its potential interest, dissolved transition metal (TM) ions toward anode sides can catalyze parasitic reactions such as electrolytic decomposition and dendritic Li growth, ultimately leading to catastrophic safety hazards. In this study, we demonstrate that Prussian Blue (PB) nanoparticles anchored to a commercial PE separator significantly reduce cell resistance and effectively suppress TM crossover during cycling, even under harsh conditions that accelerate Ni dissolution. Therefore, using a PB-coated separator in a harsh condition to intentionally dissolve Ni 2+ ions at a high cutoff potential of 4.6 V, NCM||graphite full cells maintain 50.8% of their initial capacity at the 150th cycle. Scalable production of PB-coated separator through the facile synthetic methods can help establish a new research direction for the design of high-energy-density batteries.
Keyphrases
- transition metal
- ion batteries
- aqueous solution
- reduced graphene oxide
- heavy metals
- quantum dots
- induced apoptosis
- metal organic framework
- single cell
- cell cycle arrest
- gold nanoparticles
- carbon nanotubes
- cell therapy
- randomized controlled trial
- risk assessment
- high intensity
- clinical trial
- stem cells
- highly efficient
- cell death
- water soluble
- room temperature