Gesellschaft Deutscher Chemiker
Keine Benachrichtigungen
Sie haben noch keine Lesezeichen


A novel perspective on surface modification of LiNi0.5Co0.2Mn0.3O2 cathode materialfor lithium‐ion batteries

Von Wiley-VCH zur Verfügung gestellt

High nickel ternary cathode materials have caught much consideration by reason of their remarkable energy density, cycling stability and low pollution. However, the materials with the instability of nickel are prone to crack during long-term cycle process; secondly, the residual alkali on the surface of materials would react with the electrolyte to corrode the electrode. To solve the above problems, the particle surface is usually coated with a protective layer of Al2O3 with good compatibility and thermal stability. Whereas, this method is relatively complicated and produces toxic organic solvents. In addition, the thick coating layer increases the charge transport resistance and decreases the lithium-ion transport rate. Herein, we design a novel surface modification strategy: nano-Al2O3 is loaded on the micro-particles to form a series of stable points to improve the stability of the interface boundary, while the charge transmission impedance does not change significantly. As a result, the lithium-ion transmission coefficient is greatly improved, whose capacity retention rate is still up to 86.17% at 1 C after 100 cycles. This surface modification strategy is simple to operate and low in cost, which could meet industrial mass production.

Zum Volltext

Überprüfung Ihres Anmeldestatus ...

Wenn Sie ein registrierter Benutzer sind, zeigen wir in Kürze den vollständigen Artikel.