Efficient and scalable encapsulation process of highly conductive 1T-MoS2 nanosheets on Ni-rich LiNi0.83Co0.11Mn0.06O2 cathode materials for high-performance lithium-ion batteries

Concerted Effect of Ion- and Electron-Conductive Additives on the Electrochemical and Thermal Performances of the LiNi0.8Co0.1Mn0.1O2 Cathode Material Synthesized by a Taylor-Flow Reactor for Lithium-Ion Batteries

“…In this case, the C̅O bond may also be attributed to the PDA-treated VGCFs material [carboxy (RC̅O), amino (RNH), imine (C̅N) and phenol (ROH)], which prevents excessive decomposition of the carbonate-containing electrolyte at the NCM811 cathode interface. The F 1s spectra in Figure c show three distinct fluorine-based peaks (i.e., LiF, Li x PO y F z , or Li x PF y and PVDF) for both cycled electrodes, probably owing to the hydrolysis of the LiPF 6 salt during long-term cycling. , The PVDF peak of the cycled NCM811@Li-BTJ + 1% PDA-VGCF electrode shifted to higher binding energy (BE: 690.4 eV) than that of the cycled NCM811@Li-BTJ electrode (BE: 689.5 eV). Notably, the intensities of the LiF and Li x PO y F z /Li x PF y peaks for the cycled NCM811@Li-BTJ + 1% PDA-VGCF electrode were considerably reduced relative to the cycled NCM811@Li-BTJ electrode, confirming the effective suppression of further CEI layer growth on the NCM811 active material surface, which is consistent with the postmortem TEM findings, as shown in Figure c.…”

Synergistic Low-Pt Modification and Ni Doping Facilitate the MoS2 Phase Transition for Accelerating the Hydrogen Evolution Reaction

“…Ni 2p 3/2 and 2p 1/2 combine at energies that are higher (4.98 eV) in Pt@1T-MoS 2 –Ni than they do in 1T-MoS 2 –Ni (Figure d), indicating that the Ni atom significantly impacts the electrical structure of the Pt atom in Pt@1T-MoS 2 –Ni. Moreover, the decrease in binding energy implies an increase in electron density, which facilitates the adsorption of H* and enhances HER activity. , Figure e displays the Pt@MoS 2 Pt 4f XPS spectrum. The binding energies of the Pt 4f 7/2 and 4f 5/2 orbitals, which are a bit distinct from the metal Pt 0 , are 72.32 and 75.6 eV, respectively, which normally lie about 71 and 74 eV. ,− The forward shift in the Pt binding energy indicates a transfer of electrons from Pt to MoS 2 , resulting in the Pt–S on Pt@MoS 2 bond to form Pt δ+ , In addition, the Pt 4f 7/2 and 4f 5/2 orbitals of Pt@1T-MoS 2 –Ni have lower binding energies (−0.44 eV) than those of Pt@MoS 2 , indicating a weaker interaction between Pt and Ni atoms.…”

“…Moreover, the decrease in binding energy implies an increase in electron density, which facilitates the adsorption of H* and enhances HER activity. 46,47 Figure 4e displays the Pt@MoS 2 Pt 4f XPS spectrum. The binding energies of the Pt 4f 7/2 and 4f 5/2 orbitals, which are a bit distinct from the metal Pt 0 , are 72.32 and 75.6 eV, respectively, which normally lie about 71 and 74 eV.…”

Al- and Nb-Comodified Ni-Rich NCM Cathode for High-Performance Lithium-Ion Batteries

“…4 The performance of LIBs, especially their energy density, is largely dependent on the cathode materials. 5 The Ni-rich layered oxide cathode is considered the preferred material of power batteries because of its high energy density. 6 However, the unsatisfied cyclic and thermal stability hinders its large-scale application.…”

“…Lithium-ion batteries (LIBs) are widely used because of their high energy density, low pollution, and other advantages. − However, in recent times, LIBs have struggled to fulfill the increasing energy density requirements . The performance of LIBs, especially their energy density, is largely dependent on the cathode materials . The Ni-rich layered oxide cathode is considered the preferred material of power batteries because of its high energy density .…”