Pristine organo-imido polyoxometalates as an anode for lithium ion batteries

Abstract

. (2014). Pristine organo-imido polyoxometalates as an anode for lithium ion batteries. RSC Advances: an international journal to further the chemical sciences, 4 (15), 7374-7379. Pristine organo-imido polyoxometalates as an anode for lithium ion batteries AbstractHere we have designed a strategy to improve the electronic conductivities of polyoxometalates (POMs) via property-oriented organic grafting for use in lithium-ion batteries (LIBs). POMs usually exhibit limited electronic conductivity that hinders their use in electronic applications. Organic grafting of POMs defines a valuable path for improving electronic conductivities of POMs, due to the enhanced metal to ligand charge transfer (MLCT) via d-π electronic interactions, and results in their feasible application in LIBs. Comparative practical and theoretical study of the effect of functional groups revealed that grafting of the remote electron withdrawing group (-SCN) on POMs via organo-imidoylization along with lower values of lowest unoccupied molecular orbitals (LUMO) results in an enhanced performance as Mo6-SCN shows initial discharge capacity of ∼1678 mA h g-1 with ∼85% capacity retention and coulombic efficiency ∼100% after 100 cycles. 2014 The Royal Society of Chemistry. Comparative practical and theoretical study of the effect of functional groups revealed that grafting of the remote electron withdrawing group (-SCN) on POMs via organo-imidoylization along with lower values of lowest unoccupied molecular orbitals (LUMO) results in an enhanced performance as Mo 6 -SCN shows initial discharge capacity of $1678 mA h g À1 with $85% capacity retention and coulombic efficiency $100% after 100 cycles.

Control over large-volume changes of lithium battery anodes via active–inactive metal alloy embedded in porous carbon

“…Therefore, in order to achieve the practical applications of LIBs in EVs, there are numerous efforts on seeking for high performance anode materials that possess high capacity and excellent stability with long cyclic life [5][6][7]. Metallic tin (Sn) is considered as a potential substitute for conventional graphite anode (372 mAh/g) due to its high theoretical capacity (992 mAh/g) and thermal stability [8,9].…”

Microwave‐Assisted Preparation and Characterization of a Polyoxometalate‐Based Inorganic 2D Framework Anode for Enhancing Lithium‐Ion Battery Performance

“…Grafted POMs with nanotubes, [53,54] carbon black, [55] graphene, [51,56] or organic groups to generate ac onducting POM matrix had been attested to be a practical strategy to improvet he cycle stabilitya nd cycle performance. [52] Of all the previous studies, nanocarbon materials (especially carbon nanotubes and graphene) show ap ossibility to incooperate POMs wellt o www.chemasianj.org 2018 Wiley-VCH Verlag GmbH &Co. KGaA, Weinheim meet the challengesi ne nergy storage, as it not only enhances the conductivity of the pure POMs buta lso restrains the POMs' volumee xpansion during the chargea nd discharge process (Table 1). [52] Of all the previous studies, nanocarbon materials (especially carbon nanotubes and graphene) show ap ossibility to incooperate POMs wellt o www.chemasianj.org 2018 Wiley-VCH Verlag GmbH &Co. KGaA, Weinheim meet the challengesi ne nergy storage, as it not only enhances the conductivity of the pure POMs buta lso restrains the POMs' volumee xpansion during the chargea nd discharge process (Table 1).…”

Nanostructured Anode Materials for Lithium Ion Batteries: Progress, Challenge and Perspective

“…Recently, Khan et al have designed a unique method to improve the conductivity by grafting the electron donating groups on the POM cluster. [194] They functionalized hexamolybdate with three different groups, -SCN with electron withdrawing affinity, -H with no effect on electronic flow and -CH 3 with electron donating effect to explore the hypothesis that by tuning the electronic density of POM their performance can be boosted up. It is found that after grafting all these groups, the capacitive performance of hexamolybdate has improved due to the structural stability or electronic disturbance.…”