Revealing the interface-rectifying functions of a Li-cyanonaphthalene prelithiation system for SiO electrode

A Review of Chemically Induced Intercalation and Deintercalation in Battery Materials

“…Materials with large volume changes can benefit from prelithiation by preconditioning the material for subsequent repetitive cycling and reducing stress within the material. Among others, this approach has shown significant success with silicon-based anodes, [84][85][86][87] FeS 2 , [88] and tin [89] among others.…”

Deficient TiO2−x coated porous SiO anodes for high-rate lithium-ion batteries

“…5f is composed of a semicircle in the high-frequency region as well as a sloping line in the low-frequency region, which is related to the charge transport resistance on the interface between electrode and electrolyte and the lithium-ions diffusion, respectively. [7][8][9] After one cycling measurement, the SEI films on the anode were gradually generated and influenced the charge transfer impendence existing in the electrode-electrolyte interface. It is obvious that both the semicircles of porous SiO/TiO 2−x composites under the above circumstances are smaller than those of SiO and the porous SiO anode, suggesting easier charge transmission during the lithiation and de-lithiation process.…”

“…In general, attributed to the limited surface reactive sites and restricted diffusion channels for lithium-ions of anode materials, the excess lithium-ions pretend to separate out of the electrode and eventually form the lithium dendrites during the deep discharging process. 8,55 In addition, the unstable interface between the electrode and electrolyte is also conducive to the growth of lithium dendrites. However, the synthesized porous SiO/TiO 2−x composites possess sufficient reactive sites along with a fast diffusion rate for lithium-ions owing to the internal pores within the structure.…”

“…[1][2][3][4] Benefiting from high specific capacity (∼2400 mA h g −1 ), appropriate working potential and alleviated volume change during the lithiation/delithiation process, silicon monoxide (SiO) is supposed to be a promising anode for LIBs in comparison to silicon. [5][6][7][8][9][10] Nevertheless, two main challenges impede the practical application of SiO anode for high-rate LIBs. The first one is the slug-gish migration rate of lithium ions within SiO bulk, which would result in the huge polarization of electrodes in the fast charging and discharging process, thus increasing the resistance at a high current density.…”

Phase Control of Lithium Silicates for Process‐Friendly Prelithiated SiO Anode Materials**

“…The specific capacity degradation of the prelithiated SiO anodes is in line with several previous reports. [27][28][29] On the contrary, the SiO anodes prelithiated via the electrochemical or wet chemical methods seem capable of maintaining the specific capacity with a better ICE close or higher than 100 %, [18,[30][31][32] implying those means could deliver superior results when the electrode-level rather than powder-level prelithiation is employed. Slight overpotential is also observed in the prelithiated graphene-SiO anodes, implying the skip of lithium silicate formation in the cell during the first cycle.…”