An insight into the sodium-ion and lithium-ion storage properties of CuS/graphitic carbon nitride nanocomposite

Abstract

Metal sulfides are gaining prominence as conversion anode materials for lithium/sodium ion batteries due to their higher specific capacities but suffers from low stability and reversibility issues.

Molten salt synthesis of disordered spinel CoFe2O4 with improved electrochemical performance for sodium-ion batteries

“…74,75 However, there is difference for the second discharge curves of the sample M900 and sample M800 and M700 due to considerable loss in specic capacity of the M900 sample. 76 This result agreed well with the capacity value of M900 sample which is lower that M800 and M700.…”

Boosting the high-rate performance of lithium-ion battery anodes using MnCo2O4/Co3O4 nanocomposite interfaces

“…It is well-known that the high specific capacity results from the diffusion contribution, whereas the excellent rate capability is attributed to its surface contribution. 29 Thereafter, the contributions of diffusion controlled and surface-controlled mechanisms were calculated using the following eqn (vi) and (vii): 30 i ( V ) = k 1 v + k 2 v 1/2 i ( V )/ v 1/2 = k 1 v 1/2 + k 2 where i ( V ) is the current at constant potential. k 1 v and k 2 v 1/2 represent the contributions of surface-controlled and diffusion-controlled processes, respectively.…”

“…It is well-known that the high specific capacity results from the diffusion contribution, whereas the excellent rate capability is attributed to its surface contribution. 29 Thereafter, the contributions of diffusion controlled and surface-controlled mechanisms were calculated using the following eqn (vi) and (vii): 30…”

Self-assembling CuS anodes with conversion reaction for ultrafast Na-ion storage

“…Instead, they give rise to a new phase of Cu 1+x S (0 < x # 1) due to the reaction between CuS and additional Cu dissolved from the Cu current collector. 18,34 This newly formed Cu 1+x S phase can produce other stable phases in the subsequent sodiation processes. Therefore, relying on the intermediate phases formed during the initial sodiation process (i.e., irreversible phase transition) is inadequate to explain the superior rate performance of the CuS anode.…”