A general strategy towards carbon nanosheets from triblock polymers as high-rate anode materials for lithium and sodium ion batteries

Abstract

Carbon nanosheets from triblock polymers behave well as anode materials for lithium- and sodium-ion batteries.

Three‐Dimensional Graphene‐based N‐doped Carbon Composites as High‐Performance Anode Materials for Sodium‐ion Batteries

“…There were two diffraction peaks centered at ca. [6,22] These results indicated that the PI had been successfully converted to amorphous after carbona nnealing process 23 .T his finding was further elucidated by the Fouriert ransform infrared (FTIR) spectra of the composites before anda fter carbonization treatment ( Figure 3b). [6,21] In contrast, only the broad peak at ca.…”

“…[1,2] Despite these advantages, the limited lithium resource on earth restricts the applications of LIBs severely.I nview of this, researchers have made great efforts to explore alternative energy storages ystems. [5,6] However,o nly a few anode materials are suitable for SIB, because of larger radius of Na than Li, which would suffer from more serious volumee xpansion during the charge/discharge process and lead to more sluggish sodium kinetics, more difficult intercalation into the lattice andl ower diffusion in the electrode materials. [5,6] However,o nly a few anode materials are suitable for SIB, because of larger radius of Na than Li, which would suffer from more serious volumee xpansion during the charge/discharge process and lead to more sluggish sodium kinetics, more difficult intercalation into the lattice andl ower diffusion in the electrode materials.…”

“…[5,6] However,o nly a few anode materials are suitable for SIB, because of larger radius of Na than Li, which would suffer from more serious volumee xpansion during the charge/discharge process and lead to more sluggish sodium kinetics, more difficult intercalation into the lattice andl ower diffusion in the electrode materials. [3,6,[8][9][10][11][12][13] However,t hese materials show al ow discharge capacityi nS IBs (approximately 350 mAh g À1 )b ecause of the poor insertion kinetics of Na ions into these nanomaterials. [3,6,[8][9][10][11][12][13] However,t hese materials show al ow discharge capacityi nS IBs (approximately 350 mAh g À1 )b ecause of the poor insertion kinetics of Na ions into these nanomaterials.…”

“…[3,6,[8][9][10][11][12][13] However,t hese materials show al ow discharge capacityi nS IBs (approximately 350 mAh g À1 )b ecause of the poor insertion kinetics of Na ions into these nanomaterials. [6,14] Furthermore, the carbon materials with heteroatom doped and nanopore structure have been proved to significantly increases urface wettability and improvet he electrical conductivity of the electrodes to promote electrode-electrolytei nteractions,t herefore, can help generate high sodium storage capacity throughs urface adsorption and faradicr eaction. [6,14] Furthermore, the carbon materials with heteroatom doped and nanopore structure have been proved to significantly increases urface wettability and improvet he electrical conductivity of the electrodes to promote electrode-electrolytei nteractions,t herefore, can help generate high sodium storage capacity throughs urface adsorption and faradicr eaction.…”

“…[6] The 3D graphene framework in the composites increased the contact surface with the electrolyte, and improved conductivity,thus facilitated the rapid carrier transport on the interface ands horteni on diffusion from the electrolyte to the electrode. %n itrogen contentv ia in situ polymerization of PI layers on graphene template and self-assembly of graphene into 3D network structure simultaneously followed by solvothermal and carbonization processes.…”