Corn stalks derived hierarchical porous carbon as ultra-efficient anode materials for sodium-ion batteries

Pretreatment Process Before Heat Pyrolysis of Plant‐based Precursors Paving Way for Fabricating High‐Performance Hard Carbon for Sodium‐Ion Batteries

“…In short, the electrochemical properties brought by different locations of the same plant are also different in terms of selfopening. The pore volume of the material prepared by Bottoni [118] et al using corncob was about 1.6 times higher than that of the hard carbon material prepared by Ou [37] et al using cornstalk. Similarly, the same plant at the same location with the same hole preparation of materials are also different.…”

“…[36] However, the high capacity of 195 mAh/g at current density of 1.0 A/g was achieved through the pretreatment of KOH and Ni(NO 3 ) 2 . [37] Hence, pretreatment process of precursors is a necessary step for constructing advanced hard carbon anode.…”

Boron–Phosphorus Codoped Coral-like Hard Carbon Anodes for Sodium Ion Storage

“…35 It is attributed to the irreversible reaction that occurs in the first loop forming a solid electrolyte interface (SEI) layer. 36,37 The CV curves showed good cycle overlap after the first turn, indicating that the material has good reversibility. 38 Figure 4d-f shows the initial three charge/discharge curves for electrodes at 100 mA g −1 .…”

“…The cyclic voltammetric (CV) curves of CA, CAB, and CABP at a sweep rate of 0.1 mV s –1 (Figure a-c) all showed irreversible cathodic peaks around 0.1–1.5 V in the first cycle . It is attributed to the irreversible reaction that occurs in the first loop forming a solid electrolyte interface (SEI) layer. , The CV curves showed good cycle overlap after the first turn, indicating that the material has good reversibility Figure d-f shows the initial three charge/discharge curves for electrodes at 100 mA g –1 .…”

Facilely synthesized LiFePO4nanocomposites with excellent electrochemical properties as cathodes for lithium ion batteries

“…Furthermore, the low impedance in LFP-15 can be attributed to the smaller grain size, uniform carbon layer and better electrolyte wettability. 35 We also calculated the Li + diffusion coefficient with the following two equations: 44,45 D Li + = R 2 T 2 /2 A 2 n 4 F 4 C 2 σ 2 Z ′ = R s + R ct + σω −1/2 R , T and A represent the gas constant (8.31 J mol −1 K −1 ), absolute temperature (298.15 K) and electrode surface area (1.54 cm 2 ), respectively. The term n represents the electron number per molecule during the oxidation process ( n = 1), while F , C and σ are the Faraday constant (96 485 C mol −1 ), the molar concentration of Li + (0.0228 mol cm −3 ) and the Warburg factor, respectively.…”