Mesoporous LiMnPO4/C nanoparticles as high performance cathode material for lithium ion batteries

Na2Ti3O7/C Nanofibers for High‐Rate and Ultralong‐Life Anodes in Sodium‐Ion Batteries

“…(2). The b‐value is 0.5 manifesting a diffusion‐dominated process, and the b‐value is 1 suggesting the capacitive‐controlled process , . The b‐value for both the cathodic (0.793) and anodic (0.743) are higher than 0.7, indicating a pseudocapacitive process between typical behaviors of batteries and capacitors .…”

Nitrogen-Doped TiO2–C Composite Nanofibers with High-Capacity and Long-Cycle Life as Anode Materials for Sodium-Ion Batteries

“…In this equation, the response current ( i ) and scan rate ( v ) are subject to a power-law relationship, and the value of b can be obtained from the slope (lg i vs. lg v ). A b value of 0.5 indicates a diffusion-dominated process, and a b value of 1 suggests a capacitive-controlled process [ 63 , 64 ]. The b values of both the cathodic (0.87) and anodic (0.83) peaks are larger than 0.7, indicating a pseudocapacitive process between the typical behaviors of batteries and capacitors [ 65 ].…”

Dual Modification of Olivine LiFe0.5Mn0.5PO4 Cathodes with Accelerated Kinetics for High-Rate Lithium-Ion Batteries

“…In the past few years, with the increasing popularity of electric vehicles, pursuing higher energy density has become the ultimate goal for lithium-ion batteries (LIBs), where the cathode materials contribute about 40% of the total cost. − Therefore, developing novel cathode materials with low-cost, high energy-density, and high-safety has become the spotlight of attention. − The current mainstream LiFePO 4 materials show excellent cost-effectiveness and safety, but their discharge platform is as low as 3.4 V (vs Li/Li + ), resulting in an unsatisfactory energy density (586 Wh·kg –1 ). − Considering that the Mn element can form a favorable solid solution in the LiFePO 4 framework and the Mn 2+ /Mn 3+ pair has a higher discharge platform (4.1 V vs Li/Li + ), LiMn x Fe 1– x PO 4 (LMFP) cathode materials show massive potential in the large-scale application. − It balances the advantages of LiFePO 4 and LiMnPO 4 , which can theoretically achieve low cost, high security, and enhanced energy density simultaneously. , However, the electronic and ionic conductivities of LMFP urgently need improvement due to its significantly enlarged band gap and crowded Li + diffusion channels. Moreover, the inherent Jahn–Teller effect of Mn 3+ would result in an increase in the interface impedance, further limiting the reaction kinetics of LMFP cathode materials during the rapid charge/discharge process. − …”