NH4F and carbon nanotubes co-modified LiNi0.88Co0.09Al0.03O2 cathode material with enhanced electrochemical properties for Li-ion batteries

Functional Passivation Interface of LiNi0.8Co0.1Mn0.1O2 toward Superior Lithium Storage

“…[3,8] To tackle these, some protective coatings, such as metal oxides, phosphates, fluorides, or lithium containing binary metal oxides, are employed, which is considered one of the most effective techniques. [9][10][11][12][13][14] Among the above species, phosphates coatings appear advantageous in this regard, linked to a brilliant structure stability with an essential electrochemical activity. [15][16][17] Given recent researches for manganese phosphate and cobalt phosphate coatings, the implementation of an amorphous phosphate coating can significantly boost the charge transfer at the cathode-electrolyte interface and contribute to an excellent rate capability of the resultant cathodes.…”

New Insight into the Role of Mn Doping on the Bulk Structure Stability and Interfacial Stability of Ni‐Rich Layered Oxide

“…The initial cycle discharge capacities of the M0.01−NCA and M0.02−NCA are 183.6 and 175 mAh g −1 following by discharge capacities of 150.9 and 133.3 mAh g −1 after 200 cycles, showing higher capacity retention of 82.2 and 76.2%, respectively. While for the higher voltage cutoff of 4.5 V, the pristine NCA, M0.01‐the pristine NCA, M0.01−NCA, and M0.02−NCA samples show capacity retention of 77.7, 86 and 83% after 100 cycles at 1 C. To illustrate the improvement of cycling performance, Figure (c) shows the cycling performance diagram compared with some of the latest reported works at 4.3 V cut‐off voltage after 100 cycles, and all the involved nickel‐rich cathode materials have similar stoichiometric ratios . It is noted that our work is comparable with them, but cycling performance needs to be improved regarding the discharge capacity.…”

“… (a) Initial charge and discharge curves of pristine and the modified electrodes under a current rate of 0.1 C between 2.5–4.3 V. Cycling performance between (b) 2.5–4.3 V and (d) 2.7–4.5 V at 1 C rate and 25 °C. (c) Cycling performance diagram compared with reported works . (e) Full pouch‐type cell cyclability of pristine and M0.01−NCA samples between 3–4.2 V at 1 C rate and 25 °C.…”

“…Figure 6 Figure 6(c) shows the cycling performance diagram compared with some of the latest reported works at 4.3 V cut-off voltage after 100 cycles, and all the involved nickel-rich cathode materials have similar stoichiometric ratios. [34][35][36][37][38] It is noted that our work is comparable with them, but cycling performance needs to be improved regarding the discharge capacity. Specially, the charge and discharge curves of the 1st, 25th, 50th, 100th, 150th, 200th cycle between 2.5 and 4.3 V for the pristine and M0.01À NCA are shown in Figure S4.…”

Ionic Conductive Interface Boosting High Performance LiNi0.8Co0.1Mn0.1O2 for Lithium Ion Batteries

“…In some studies, surface modification (i.e., surface coating and doping) has been utilized to stabilize the interface and address the aforementioned challenges. 2,8,14 Surface doping, by substituting the original ions with cations or anions such as B, 11 Ti, 7 Ta, 15 Ce, 16 V, 17 Mg, 18 and F, 19,20 aims to ensure steady the structure of Ni-rich cathode and enhance the lithium-ion diffusion kinetics. Surface coating is also an effective approach to achieve superior electrochemical performances due to protecting the Ni-rich cathode from HF, cleaning the detrimental surface functional groups (i.e., Li 2 O, LiOH, or Li 2 CO 3 ) and stabilizing the cathode/electrolyte interface as the conducting media for Li ion and electron.…”