High-voltage electrochemical performance of LiNi0.5Co0.2Mn0.3O2 cathode material via the synergetic modification of the Zr/Ti elements

Use of Ce to Reinforce the Interface of Ni‐Rich LiNi0.8Co0.1Mn0.1O2 Cathode Materials for Lithium‐Ion Batteries under High Operating Voltage

“…[1][2][3] Rechargeable batteries, as one type of electrical energy storaged evice, can be applied not only for small devicess uch as laptopsa nd smartphones, but also for larges ystems, such as national electric grids, and spacecrafta nd transportation applications,s uch as electric vehicles (EVs). [1][2][3] Rechargeable batteries, as one type of electrical energy storaged evice, can be applied not only for small devicess uch as laptopsa nd smartphones, but also for larges ystems, such as national electric grids, and spacecrafta nd transportation applications,s uch as electric vehicles (EVs).…”

“…Owing to increasingg lobal energy demandsa nd severe environmentalproblems, electrical energy storagedevices have entered into public concern. [1][2][3] Rechargeable batteries, as one type of electrical energy storaged evice, can be applied not only for small devicess uch as laptopsa nd smartphones, but also for larges ystems, such as national electric grids, and spacecrafta nd transportation applications,s uch as electric vehicles (EVs). [4,5] Next-generation energy storage systems, such as Li-air batteries, [6] Li-O 2 batteries, [7,8] Li-N 2 batteries, [9] and Zn-air batteries, [10] are attractive owing to their high theoretical energy densities and flexible structures.…”

Enhanced Electrochemical Stability of Sulfide‐Based LiNi0.8Mn0.1Co0.1O2 All‐Solid‐State Batteries by Ti Surface Doping

“…The Ni 2+ /Ni 3+ ratio of HTNMC further increased, suggesting that more Ni 3+ ions were substituted by Ti 4+ during the annealing and re‐crystallization process. The dissociation energy of Ti−O bond is much stronger than that of Ni−O, Co−O and Mn−O bond, which accounts for the lower reactivity with sulfides [35] . Considering the changes to the structure observed in diffraction where HTNMC is a single‐phase material and has a bigger unit cell volume, Ti 4+ infiltrated deeper into the bulk during annealing.…”

“…The dissociation energy of TiÀ O bond is much stronger than that of NiÀ O, CoÀ O and MnÀ O bond, which accounts for the lower reactivity with sulfides. [35] Considering the changes to the structure observed in diffraction where HTNMC is a single-phase material and has a bigger unit cell volume, Ti 4 + infiltrated deeper into the bulk during annealing. However, limited by the penetration depth of XPS, the observed changes to the Ni 2 + /Ni 3 + ratio can only represent the surface of the material (in nanometer range).…”

The effect of chelating agent on synthesis and electrochemical properties of LiNi0.6Co0.2Mn0.2O2

“…Figure 7 displays the EIS results of the three electrodes after 50 cycles at 0.2 C, which can be studied the magnitude of the impedance of Li + during insertion and extraction [31,32]. The intercept of the Z axis corresponds to the ohmic resistance (Rs) of electrolyte between the working electrode and the reference electrode, the semicircle in the high frequency range is associated with cathode interface film resistance (R SEI ), the second semicircle in the middle frequency is assigned to the charge transfer resistance (R ct ), and a oblique straight line in the low frequency is assigned to the Li + diffusion coefficient W z , the smaller the slope, the greater the impedance [33][34][35][36][37]. The impedance parameters simulated using the equivalent circuit are listed in Table 2, which were simulated by Zview software, it can be clearly seen that the minimum and maximum of resistance is G-622 and C-622, respectively, which can be determinate by the structural stability of C-622 is worst, the initial particle size of S-622 is largest, the structural stability of G-622 is best, among the three electrodes.…”