Rational design and kinetics study of flexible sodium-ion full batteries based on binder-free composite film electrodes

Abstract

Flexible sodium-ion full batteries were rationally designed by using hard carbon fibers from carbonized filter paper as a conductive supporting framework.

N-doped hard/soft double-carbon-coated Na3V2(PO4)3 hybrid-porous microspheres with pseudocapacitive behaviour for ultrahigh power sodium-ion batteries

“…2e shows that the nitrogen adsorption-desorption sorption isotherms of different samples. All the samples show the same isotherms (type-IV) and H3-type hysteresis loop caused by non-uniform wormlike pores, implying the typical mesopore characteristics [43,44].…”

“…2d), so that the specific surface area of N-HSDC/NVP-HMs-3 became lower compared with N-HSDC/NVP-HMs-2. It is well known that high specific surface area of cathode material can increase the contact area between the cathode and the electrolyte, which is beneficial to improve its rate performance [43,44]. Therefore, the N-HSDC/NVP-HMs-2 cathode possesses the best rate performance than other samples at higher rates of 20-50 C (Fig.…”

“…Among these strategies, N-doped carbon coating [36][37][38][39] and double-carbon coating [40][41][42] have been regarded as the most facile and effective routes to enhance the electrochemical property for NVP. Our works have also demonstrated that hard carbon nanospheres and soft carbon material represent the most promising electrodes for SIBs due to its high storage capacity and cycling stability [43][44][45][46].…”

Synthesis of Erythrocyte‐Like P2‐Type Na0.67Mn0.75Co0.25O2 for Sodium Storage

“…Figure shows the linear fitting profiles between the Ip and v 1/2 from CV profiles (Figure a). The reduction and oxidation currents exhibit a well linear relationship with v 1/2 , indicating a diffusion controlled process during the sodium storage in electrodes . Through the calculation, the values of D for the oxidation and reduction are 4.04×10 −12 and 1.15×10 −11 cm 2 s −1 , respectively, indicating a faster reduction.…”

Superior Cycling Stability and Fast Reaction Kinetics of NaV2.9Mg0.1(PO4)3/C Anode for Sodium‐Ion Batteries

“…Rechargeable sodium‐ion batteries (SIBs) have been widely investigated as a potential alternative to lithium‐ion batteries for cost‐effective storage of renewable energies, due to earth abundance and wide availability of sodium resources and similar intercalation‐chemistry properties . A number of transition‐metal oxides, Prussian‐blue analogues, fluorophosphates, phosphates, and pyrophosphates have accordingly introduced as functional electrode materials for SIBs.…”