Enhancing the electrochemical performance of Co-less Ni-rich LiNi0.925Co0.03Mn0.045O2 cathode material via Co-modification with Li2B4O7 coating and B3+ doping

LiBF4 Induced Unique Surface Modification Enables Improved Electrochemical Performance of LiNi0.8Co0.1Mn0.1O2 Cathode

“…The peak at 192.3 eV is assigned to B=O. Combined with the verification results in Figure 2(a), it can be concluded that the presence of Li 2 B 4 O 7 on the surface of NCM811@LBF‐0.7 material [38–40] . In addition, the fluorine signal at 685.7 eV belonging to Li−F can easily be detected on the surface, suggesting the presence of LiF in the coating layer [41,42] .…”

“…[36,49] On the other hand, the coating layer consisting of Li 2 B 4 O 7 owns a positive effect on the transport of Li + . [39,40,50] As can be seen from the rate capability curves in Figure 5(b), there is no significant difference between the discharge specific capacity of prepared samples at a low rate. However, the discharge capacity of the NCM811@LBF-0.7 sample at 2 C is 170.7 mAh g À 1 , which is much higher than the original NCM811 sample (151.0 mAh g À 1 ).…”

“…On one hand, the presence of the lithium impurities on the pristine hinders the direct contact between the active material and the electrolyte [36,49] . On the other hand, the coating layer consisting of Li 2 B 4 O 7 owns a positive effect on the transport of Li + [39,40,50] . As can be seen from the rate capability curves in Figure 5(b), there is no significant difference between the discharge specific capacity of prepared samples at a low rate.…”

“…Combined with the verification results in Figure 2(a), it can be concluded that the presence of Li 2 B 4 O 7 on the surface of NCM811@LBF-0.7 material. [38][39][40] In addition, the fluorine signal at 685.7 eV belonging to LiÀ F can easily be detected on the surface, suggesting the presence of LiF in the coating layer. [41,42] Based on the above analysis, we can conclude that a hybrid LiF-Li 2 B 4 O 7 coating layer has been successfully constructed on the surface of the NCM811@LBF-0.7, which can prevent corrosion of HF, inhibit the dissolution of transition metals and improve the interface stability of materials.…”

Ni-Rich Co-less Cathode Materials with LiYO2 and Y3+ Modification Toward Improved Storage Performance against Ambient Air for Lithium-Ion Batteries

“…The precursor Ni 0.925 Co 0.03 Mn 0.045 (OH) 2 was synthesized by a continuous coprecipitation method based on our previous publication. 42 The LiNi 0.925 Co 0.03 Mn 0.045 O 2 (NCM) cathode material was prepared by the precursor and lithium hydroxide mixture calcined at a temperature of 750 °C for 15 h in an atmosphere of oxygen. A series of yttrium-modified cathode materials were synthesized by the same calcination mechanism.…”