Alumina coating on 5 V lithium cobalt fluorophosphate cathode material for lithium secondary batteries – synthesis and electrochemical properties

Abstract

The high voltage cathode material, Li2CoPO4F was successfully synthesized and coated with various amounts of Al2O3 for enhanced electrochemical performance.

Highly Stable Na2/3(Mn0.54Ni0.13Co0.13)O2 Cathode Modified by Atomic Layer Deposition for Sodium‐Ion Batteries

“…The dissolution of the SEI film leaves the active species able to interact directly with the acidic electrolyte and, thereby,t he discharge capacity is enormously reduced upon subsequentc ycling progress. [28] Ah igh capacity of approximately 72 mA hg À1 waso bserved for the electrode coated with 2A LD cycles at 15C.U nfortunately, the MNC-10 electrode delivered the lowest capacity value. This may be ar esult of the thick insulatingA l 2 O 3 layer.…”

“…Traditionally,s olution-based coating methods, such as sol-gela nd hydrothermal methods, are adopted to deposit metal-oxide coatingso nt he surface of cathode materials. [23,28] However, uniform coatingsa re difficultt op roduce by using conventional coating methods, which result in rough surface coatings that inadequatelyp rotect the surface. In addition, these solution-based methods requirealarge amount of precursora nd solvent, as well as subsequenth eat treatment.…”

“…In addition, these solution-based methods requirealarge amount of precursora nd solvent, as well as subsequenth eat treatment. [23,28] Atomic layer deposition (ALD) is atechnique that has recently been used to coat metal oxides on anode and cathode materials for LIB applications. ALD has the excellent capability of coating thinf ilms at the atomics cale along with unprecedented uniformity.…”

Suppressing self-discharge of Li–B/CoS2 thermal batteries by using a carbon-coated CoS2 cathode

“… 11–13 The alumina coating for lithium cobalt fluorophosphate was reported to prevent metal ion dissolution and improve the cycle performance. 14 A widely recognized interpret is that the alumina coating can protect cathode materials from hazardous reaction products such as HF obtained during the charge–discharge process. 15,16 Petnikota has modified FeO, MnO and Co 2 Mo 3 O 8 by coating of graphene oxide for anode application in lithium ion batteries.…”

A Two-Step Synthesis for Li2CoPO4F as High-Voltage Cathode Material

“…[6][7][8] By coating Li 2 CoPO 4 F particles with Li 3 PO 4 , Al 2 O 3 or ZrO 2 or decreasing the particle size this drawback can be overcome. [10][11][12] Herein, we report the preparation of Li 2 CoPO 4 F composed of small particles via the direct conversion of a sub-micrometer particle mixture of LiCoPO 4 and LiF, which in turn was prepared by a solvothermal one-step reaction.…”