Towards superior cyclability of LiNi0.8Co0.15Al0.05O2 cathode material for lithium ion batteries via yttrium modification

Conductive polymer polyaniline covering promotes the electrochemical properties of a nickel-rich quaternary cathode LiNi0.88Co0.06Mn0.03Al0.03O2

“…3 As is well known, LIBs are mainly composed of a cathode material, anode material, separator and electrolyte, and compared to the anodes, the cathodes deliver much less specific discharge capacity, which limits the increase of energy density for LIBs. 4,5 Therefore, achieving a high discharge capacity of cathodes has become a significant task and research hotspot to improve the performance of LIBs. Furthermore, an increase of nickel content in cathode materials has demonstrated an obvious effect in promoting the specific capacity.…”

Enhancing the Electrochemical Performance of Ni-Rich LiNi0.88Co0.09Al0.03O2 Cathodes through Tungsten-Doping for Lithium-Ion Batteries

“…Currently, they are most often used in laptops, mobile phones, digital cameras, and other portable devices, as well as in electric and hybrid cars [1][2][3][4][5]. Among the commonly available LIB cathode materials, Ni-rich layered cathode materials, particularly LiNi x Co y TM 1−x−y O 2 , are believed to be the best choice of power sources for the current electric vehicles [6][7][8][9][10][11][12][13]. The LiNi 0.8 Co 0.15 Al 0.05 O 2 cathodes, for example, have been successfully applied to LIB to store electricity for Tesla electric vehicles, but it still has a cruising distance problem and insufficient cycle life [5,14,15].…”

“…Recently, researchers have been attempting to improve the structural stability of nickel-rich cathodes via replacing transition metals with atoms of different elements. According to reports, various atoms (Na, Al, Ti, Mn, Y, Zr, Gd, F, and B) have been used to dope the nickel-rich layered cathode materials, which led to a great improvement in the electrochemical performance of the materials [10,13,19,[32][33][34][35][36]. Furthermore, Sun et al have demonstrated that W-doping can surmount the problem in LiNiO 2 with inherent structure instability and significantly improve its cycle performance and thermal properties without reducing its capacity [37].…”

Enhancing Cell Performance of Lithium-Rich Manganese-Based Materials via Tailoring Crystalline States of a Coating Layer

“…Nowadays, the increasingly pronounced energy crisis promotes the development of lithium-ion batteries (LIBs) toward higher energy density and superior cycling stability. − Cathode materials, as one of the core components of LIBs, have been widely studied to meet the demand of good properties, lower cost, and less toxicity. Thus, Li-rich Mn-based layered materials (LRMs) are deemed to be those cathode materials with great commercial potential for LIBs regarding their high discharge capacities (over 250 mA·h·g –1 ) and mass energy densities (over 1000 W h kg –1 ). − Nevertheless, they suffer from numerous issues containing unsatisfactory initial Coulombic efficiency, fast capacity attenuation, serious voltage decay, and transition-metal dissolution, which critically limits their commercial application. − …”