Improving cycling performance and rate capability of Ni-rich LiNi0.8Co0.1Mn0.1O2 cathode materials by Li4Ti5O12 coating

Voltage fade mitigation in the cationic dominant lithium-rich NCM cathode

“…F ast charging, lightweight and stable storage techniques can complement the green energy generation sources such as wind or solar to provide efficient and completely renewable energy systems. Scientists have been incessantly working on developing various lithium-based compounds such as high nickel NCM811 and NCA to meet the needs [1][2][3][4][5][6][7][8][9] . However, from their intrinsic layered-type structure, these compounds have limited specific capacity by the number of lithium ions that can participate in redox reactions.…”

Structure and electrochemical performance modulation of a LiNi0.8Co0.1Mn0.1O2 cathode material by anion and cation co-doping for lithium ion batteries

“…As expected, the secondary particles are consisted of Ni, Co, Mn and B, con-rming the uniform doping of Co and B. 25 In order to analyze the element concentration versus depth of NCM/CB, the EDS line scan analysis of cross-sectional image was obtained. As shown in Fig.…”

“…To overcome the above problems, a great number of strategies have been explored to boost the physical and chemical stability of this cathode by morphology design, surface modi-cation and interior ionic doping. [17][18][19][20][21][22][23][24][25] Various of coating substances including metal oxides, metal phosphates and metal uorides have been used to stabilize the interface between electrode and electrolyte. Although the coating layer could stabilize the structure of the interface region and alleviate the side reaction between electrode and electrolyte, the approach for construction of modication layer usually need post coating process, thus increasing the complexity of material manufacture.…”

Layer‐Based Heterostructured Cathodes for Lithium‐Ion and Sodium‐Ion Batteries

“…When compared to the single phase references, this composite demonstrates a capacity improvement of 98 mAh g −1 in cyclic test at 10 C, and retains 50% more capacity after 100 cycles at 0.1 C (Figure g,h). Indeed, the reversible capacities of the presented composites are still limited to about 200 mAh g −1 at 0.1 C rate, but the positive reinforcement of Fd m spinels on rate performance and cyclability of R m LiMO 2 can be clearly observed …”

“…Thereafter, a PVP assisted method was also proposed by the same group to fabricate ultrathin spinel membrane‐encapsulated LL, which demonstrates superior electrochemical properties compared to untreated LL (Figure e–g) . AlF 3 coating, carbon coating, and acid treatment were also reported as feasible strategies to induce phase transition of surface LL to spinel and improve material performances . For example, a layered‐to‐spinel phase transformation of LL surface was induced by Li + leaching after AlF 3 coating, which increases the material initial coulombic efficiency from 82.8% (pristine) to 197.1% (10 wt% AlF 3 coating) at 20 mA g −1 and capacity retention at 500 mA g −1 (vs capacity at 25 mA g −1 ) from 68% (pristine) to 76% (1 wt% AlF 3 coating) .…”