Growing vertical graphene sheets on natural graphite for fast charging lithium-ion batteries

One-step vapor-pressured induced synthesis of spherical-like Co9S8/N, S-codoped carbon nanocomposites with superior rate capability as lithium-ion-battery anode

“…i = k 1 v + k 2 v 0.5 was presented, where i composes of pseudocapacitive process (k 1 v) and diffusion-controlled behaviors (k 2 v 0.5 ). [13][14][15] Clearly, the percentage of pseudocapacitive contribution rises gradually with v increasing from 0.2 to 1 mV s -1 (Figure 4c) to demonstrate high effect of pseudocapacitive contribution on the enhancement of the capacity and rate performances. The high pseudocapacitive contribution mainly arises from extra Li + storage sites, such as interfaces and defects.…”

“…logi = blogv + loga. [13][14][15] It can be obtained that the b is the slope of logi-logv plots, which is 1.0 to suggest a capacitive-controlled process and is 0.5 to indicate a diffusion-dominated process. It can be seen that b value is 0.84-0.88 for the two peaks (Figure 4b) to exhibit that both the diffusioncontrolled and pseudocapacitive-controlled process contribute the total capacity.…”

“…The high pseudocapacitive contribution mainly arises from extra Li + storage sites, such as interfaces and defects. [13][14][15][16][17][18][19]…”

Nano Sn2S3 Embedded in Nitrogenous‐Carbon Compounds for Long‐Life and High‐Rate Cycling Sodium‐Ion Batteries

“…Furthermore, the energy densities of S-0, S-1, S-2 were calculated via the following equations [Eqs. (2)-( 4)]: [30] Gravimetric energy density ½Wh kg…”

Ge nanocrystals tightly and uniformly distributed in a carbon matrix through nitrogen and oxygen bridging bonds for fast-charging high-energy-density lithium-ion batteries

“…Clearly, a discharge platform appears from 3.0 to 3.2 V (Fig. 5a) to produce a high nominal voltage of 3.1 V. at 0.1 C are 481.5 Wh kg -1 /1019.1 Wh l -1 higher than full cells of graphite/LFP, 30 graphite/LiCoO 2 (LCO), 31 SiO x /C/LCO, 32 and Si/C/LCO. 33 Importantly, the energy density of 358.7 W h kg -1 at 5 C obtained within charging time less than 8 minute ( Fig.…”