High-performance lithium–organic batteries by achieving 16 lithium storage in poly(imine-anthraquinone)

Abstract

The Li/PIAQ cell exhibits excellent electrochemical performances with a 16 Li-storage mechanism based on DFT calculations and experimental investigations.

All‐Solid‐State Lithium–Organic Batteries Comprising Single‐Ion Polymer Nanoparticle Electrolytes

“…Until recently, most research focused on the molecular design of redox‐active organic materials with tunable electrical and electrochemical properties . Such materials include, but are not limited to, conjugated quinones with low band‐gap energies, N‐heteroaromatic molecules capable of multielectron redox reactions, and organic radicals with fast charge‐transfer kinetics . Nevertheless, the dissolution of redox intermediates in liquid electrolytes has been a longstanding challenge, which is closely related to the poor cycling stability of the corresponding batteries…”

Strongly Coupled MoS2 Nanocrystal/Ti3C2 Nanosheet Hybrids Enable High‐Capacity Lithium‐Ion Storage

“…By contrast, the pure MoS 2 only shows a reversible capacity of 722.6 mAh g −1 . Note that the gradually increased reversible capacity can be ascribed to the improved lithium‐ion accessibility and gradual activation of MoS 2 upon cycling . The rate capabilities of Ti 3 C 2 , MoS 2 and MoS 2 /Ti 3 C 2 were also studied.…”

“…By contrast, the pure MoS 2 only shows ar eversible capacity of 722.6 mAh g À1 .N ote that the gradually increased reversible capacity can be ascribed to the improved lithium-ion accessibility and graduala ctivationo fM oS 2 upon cycling. [22] Ther ate capabilities of Ti 3 C 2 ,M oS 2 and MoS 2 /Ti 3 C 2 were also studied. As showni nF igure 3f,t he MoS 2 /Ti 3 C 2 electrode shows the best performance compared with Ti 3 C 2 and MoS 2 at various current densities, delivering capacities of 674.9, 682.9, 639.2, 587.6, and 533.5 mAh g À1 at 0.1, 0.2, 0.5, 1, and 2Ag À1 ,r espectively corresponding to values 1.08, 1.19, 1.19, 1.23, and 1.33 times higher than those of MoS 2 .F igure 3g provides the GCD profiles of the MoS 2 /Ti 3 C 2 electrode at various current densities.…”

Cover Feature: All‐Solid‐State Lithium–Organic Batteries Comprising Single‐Ion Polymer Nanoparticle Electrolytes (ChemSusChem 9/2020)

“…[7][8][9] Until recently,m ost research focusedo nt he molecular design of redox-active organic materials with tunable electrical and electrochemical properties. [4,[9][10][11] Such materials include, but are not limited to, conjugated quinones with low bandgap energies, [4,9,[12][13][14] N-heteroaromatic molecules capable of multielectron redox reactions, [7,15] and organic radicals with fast charge-transfer kinetics. [16] Nevertheless,t he dissolution of redox intermediates in liquid electrolytes has been al ongstanding challenge, which is closely relatedt ot he poor cycling stabilityo ft he corresponding batteries.…”

“…[19] Because of these efforts, long-term stabilities of more than 1000cycles and highd ischarge capacities of greater than 300 mAh g À1 have recentlyb een demonstrated for some organic cathode materials. [14,19,20] However,t he high solubility of organic materials in liquid electrolytes remains ac ritical drawback of most lithium-organic batteries.…”