Orientation dependence of Li–ion diffusion kinetics in LiCoO2 thin films prepared by RF magnetron sputtering

All‐Solid‐State Lithium‐Ion Microbatteries: A Review of Various Three‐Dimensional Concepts

“…[ 28 , 29 ] Differences in orientation result in a variation in lithium ionic conductivity of a few orders of magnitude. [ 35 ] When a polycrystalline HT-LiCoO 2 fi lm is randomly oriented, thereby providing lithium diffusion paths in all directions, or when it has a favorable orientation with respect to the electrolyte, it shows good rate capabilities. This makes it possible to reveal a very fl at lithium intercalation/extraction plateau around 3.9 V vs .…”

Analysis of the chemical diffusion coefficient of lithium ions in Li3V2(PO4)3 cathode material

“…In the literature, much attention has been paid to focus on the kinetic behavior of LiCoO 2 [13][14][15][16], LiMn 2 O 4 [17][18][19][20][21], LiNi 0.5 Mn 1.5 O 4 [22], Li(Ni 1/3 Co 1/3 Mn 1/3 )O 2 [23] and LiFePO 4 [24,25], of which the chemical diffusion coefficient of Li ions, D Li + , is one of the most important kinetic characteristics. In most cases, the solid-state diffusion of Li ions with rather low values of D Li + may control the rate-determining step of the intercalation process, although there may be particular cases where the rate-determining step is diffusion in the electrolyte solution within the pores of the composite electrodes [26].…”

“…In most cases, the solid-state diffusion of Li ions with rather low values of D Li + may control the rate-determining step of the intercalation process, although there may be particular cases where the rate-determining step is diffusion in the electrolyte solution within the pores of the composite electrodes [26]. Several techniques, such as the cyclic voltammetry (CV) [14,25,27,[16][17][18][19][20], electrochemical impedance spectroscopy (EIS) [13,14,25,27,[16][17][18][19][20][21][22], and galvanostatic intermittent titration technique (GITT) [14,15,18,23,24,27], have been extensively used to measure the chemical diffusion coefficient. The CV can give us quantitative information on the nature of electrode process, and the reversibility, stability and phase transformations during intercalation and de-intercalation reactions [28].…”

Impact of composite structure and morphology on electronic and ionic conductivity of carbon contained LiCoO2 cathode

“…Thus, it is clear that the smaller particle sized LiCoO 2 has the shorter diffusion length for lithium ions compared to the larger particles of LiCoO 2 within a composite electrode. The D Li of other LiCoO 2 -carbon composite electrodes is reported between 10 −13 to 10 −7 cm 2 S −1 [24][25][26][27][28][29]. The large difference of D Li is due to the different formula used for determining the diffusion coefficients by different techniques applied.…”