Synthesis and electrochemical properties of CaF2-coated for long-cycling Li[Mn1/3Co1/3Ni1/3]O2 cathode materials

Surface modification of Li(Li0.17Ni0.2Co0.05Mn0.58)O2 with LiAlSiO4 fast ion conductor as cathode material for Li-ion batteries

“…The pristine cathode powders Li (Li 0.17 Ni 0.2 Co 0.05 Mn 0.58 )O 2 were synthesized by a simple co-precipitation method and a subsequent solid-state reaction with lithium hydroxide hydrate (LiOH·H 2 O), similar to the reported method [11]. In details, the aqueous solution consisting of stoichiometric amount of manganese (9.8032 g), nickel (5.2570 g) and cobalt sulfate hydrates (1.4055 g) was co-precipitated by an excessive amount of sodium hydroxide (8.0020 g).…”

“…To fabricate the promising Li- and LiFePO 4 , owing to its extraordinarily high capacity over 250 mAh g -1 [4][5][6]. However, the Li-rich layered oxides are still frequently complained about due to some tough questions they face, which hinder the progress in their popularization in practical application, such as unsatisfied cycle performance, low initial coulombic efficiency and poor high-rate capability [7][8][9][10][11]. It is a daunting challenge for people to conquer the above mentioned problems of the Li-rich layered oxides to keep pace with the rapidly increasing requirement for satisfying batteries.…”

“…It is a daunting challenge for people to conquer the above mentioned problems of the Li-rich layered oxides to keep pace with the rapidly increasing requirement for satisfying batteries. Recently, people have made great efforts including cation and anion doping [10,12,13], surface modification [9,11,[14][15][16][17][18][19][20][21], innovation of synthesis method [22,23], and fabrication of nano-sized particles [6,24,25], to achieve the goal of commercialization of the Li-rich layered cathode materials. In particular, the surface modification by coating some materials such as metal oxides [15][16][17], phosphates [18][19][20], fluorides [9,11,21] has been regarded as one of the most effective measures to overcome drawbacks of Li-rich layered oxides.…”

Physical and electrochemical performance of LiNi 1/3 Co 1/3 Mn 1/3 O 2 cathodes coated by Sb 2 O 3 using a sol–gel process

“…Moreover, coated Li(N 1/2 Mn 1/2 )O 2 cathode demonstrated a maximum coulombic efficiency through controlling the capacity fade [10]. Likewise, various methods had been introduced to coat on the cathode surface such as wet coating [11], sol gel coating [12], melting impregnation [13], and hydrothermal coating [14]. In order to improve the electrochemical properties of LiNi 1/ 3 Co 1/3 Mn 1/3 O 2 cathode, it has been surface modified with Al 2 O 3 [15], TiO 2 [16], ZrO 2 [17], ZnO [18], and CeO 2 [19].…”

Atomic Layer Deposition of a Particularized Protective MgF2 Film on a Li‐Ion Battery LiMn1.5Ni0.5O4 Cathode Powder Material

“…The rather simple solution is to employ a metal fluoride coating, which is expected to be stable against hydrofluoric attack. Indeed, up to now a number of works were focused on the preparation and investigation of cathode materials with fluoride coating and different fluorides were evaluated: LiF, SrF 2 , MgF 2 , CaF 2 , AlF 3 , GaF 3 , CeF 3 , SmF 3 , LaF 3 , FeF 3 , ZrF x , BiOF, and LiAlF 4 . The coating thickness is determined by a tradeoff between a high Li + ‐permeability and Mn‐ion impermeability; in this regard, the coating uniformity is an important requirement, because extra‐thick areas will compromise the cathode performance and the extra‐slim areas will compromise the coating protective ability.…”