Bifunctional nano-ZrO2 modification of LiNi0·92Co0·08O2 cathode enabling high-energy density lithium ion batteries

One-time sintering process to modify xLi2MnO3 (-x)LiMO2 hollow architecture and studying their enhanced electrochemical performances

“…2 (h). The 3 d photoelectron energy of Zr in the coating material of ZrO 2 is measured to be 181.79 eV, which approaches to the data of previous report [25][26][27][28] , and the value also has slightly moved to the lower value than the fundamental XPS date of ZrO 2 (182.4 eV). In order to explore the doping effect of Zr, elemental analyses of selected points ( Fig.…”

“…Here, we report an idea based on our previous hollow architecture design work [21] to achieve ZrO 2 coated surface and element Zr doped in H0 within one-time sintering process, as shown in Scheme 1 . Compared with the preparation methods reported in the literatures [21][22][23][24][25][26][27][28] , our method is easy and simple, and the formed coating layer is uniform, which can realize the controllable preparation of the material. This is particularly noteworthy of the regular shape and proper size of particles for subsequent surface coating modification via Zr doped in basis materials.…”

“…Meanwhile, an inert oxide material of ZrO 2 which owns great stability in electrolyte is selected for covering to serve as object of following study. Previous studies indicate that element Zr served as dopant has showed positive role in lattice structure stability of cathode materials and provided more appropriate lithium ion diffusion conditions [21][22][23][24][25] , and the surface coating can reduce the reaction between the surface of the electrode material and the electrolyte, thereby improving the cycle performance of LIBs [26][27][28] . Here, we report an idea based on our previous hollow architecture design work [21] to achieve ZrO 2 coated surface and element Zr doped in H0 within one-time sintering process, as shown in Scheme 1 .…”

Research Progress on the Surface of High-Nickel Nickel–Cobalt–Manganese Ternary Cathode Materials: A Mini Review

“…LiF, Li 2 CO 3 , LiOH, and other impurities are easily deposited on the interface between the active high nickel LNCM positive electrode and the electrolyte, thereby suppressing the diffusion of Li + and reducing the electrochemical performance. To effectively prevent the side reaction between the electrode and the electrolyte, coating modification is proposed, such as coating metal oxides: Al 2 O 3 (Liao and Manthiram, 2015;Yan et al, 2016), ZrO 2 (Yang et al, 2019a), MgO (Yoon et al, 2012), ZnO (Chang et al, 2010), lanthanide oxides: La 4 NiLiO 8 , phosphate: AlPO 4 (Zhao et al, 2017), Cu 3 (PO 4 ) 2 (Zhao et al, 2016), fluoride: AlF 3 (Ding et al, 2017), transition metal oxide: Li 2 ZrO 3 (Xu et al, 2016), multiple coating: Li 2 TiO _ 3 Li 2 ZrO 3 , and LiFePO _ 4 Al 2 O 3 (Seteni et al, 2017). The double modification method combines doping and coating, as follows: Sr doping-LaMnO 3 coating , N doping-C coating (Nanthagopal et al, 2019), Zr doping-ZrO 2 coating (Wang et al, 2020e), and Sn doping-Li 2 SnO 3 coating (Zhu et al, 2020).…”

Enhanced Electrochemical and Structural Stability of Ni‐rich Cathode Material by Lithium Metaborate Coating for Lithium‐Ion Batteries

“…[10,11] It has been demonstrated that stabilizing the surface chemistry through surface coating can effectively prolong the cycling life of Ni-rich layered cathode materials. Many compounds have been used as coating materials, including metal oxides (e. g., ZrO 2 , [12] Al 2 O 3 , [13] MgO [14] ), phosphates (e. g., Li 3 PO 4 , [15] AlPO 4 [16] ), fluorides (e. g., LiF, [17] AlF 3 [18] ), etc. Ideal coating materials can not only act as a stable protective layer during cycling, but also conduct Li + .…”