11,11,12,12‐tetracyano‐9,10‐anthraquinonedimethane as a sustainable cathode for room temperature all solid‐state lithium battery

Abstract

Summary Organic electrode materials have attracted extensive attention because of their high flexibility and sustainability, but their application was limited by the disadvantage of dissolution in conventional electrolyte. Here, we designed an all solid‐state lithium‐ion battery (ASSLIB) with 11,11,12,12‐tetracyano‐9,10‐anthraquinonedimethane (TCAQ) as the cathode and lithium metal as the anode. The solid electrolyte consisted of Li6.4La3Zr1.4Ta0.6O12 (LLZTO)/polyoxyethylene(PEO) and lithium bis(trifluoromethanesulfonimide) (LiTFSI) salt. The Li||TCAQ ASSLIB delivered a discharge specific capacity of 83 mAh g−1 at a current density of 17 mA g−1 with a capacity retention of 72.2% after 100 cycles. Our research provided a new organic cathode material for high‐performance ASSLIBs.

Structure‐Property Relationships for Potential Inversion From Electron Acceptors Based on Thiophene‐Fused Triptycene Quinones, 1,4‐Diketones and Their Malononitrile Adducts

“…The distinctive functional properties of TCAQ have therefore led to a resurgence of interest towards applications including organic battery materials, [8–10] luminescent materials, [11] molecular memory, [12] catalysis, [13] and photo‐induced electron transfer processes [14] . By replacing one or both of the phenyl rings of TCAQ by heterocycles, control is granted over both the three‐dimensional geometry of the molecule and thereby its redox properties.…”

“…This stands in contrast to planar TCNQ which undergoes much less drastic structural changes upon reduction, and displays two sequential reversible single-electron reductions separated by ΔE p = 0.60 V (in DMF) with a less negative first reduction potential of À 0.125 V (vs. Ag/AgNO 3 in DMF). [5] The distinctive functional properties of TCAQ have therefore led to a resurgence of interest towards applications including organic battery materials, [8][9][10] luminescent materials, [11] molecular memory, [12] catalysis, [13] and photo-induced electron transfer processes. [14] By replacing one or both of the phenyl rings of TCAQ by heterocycles, control is granted over both the threedimensional geometry of the molecule and thereby its redox properties.…”

Solid‐State Batteries Based on Organic Cathode Materials

“…Typical strategies and examples of inhibiting dissolution of OCMs in different types of electrolytes.The optimal strategies against the dissolution of OCMs in conventional liquid electrolytes include salinization,[22] polymerization,[16] immobilization[23] and blocking. [24] The full names of the compounds are listed below: PTCDA, 3,4,9,10-perylenetetracarboxylic dianhydride;[25] AQ, 9,10-anthraquinone;[26] C4Q, calix[4]quinone;[27] THQAP, 2,3,9,10tetrahydroxyquinoxalino[2,3-b]phenazine-6,13-dione;[28] TMQ, tetramethoxy-p-benzoquinone;[29] TCAQ, 11,11,12,12-tetracyano-9,10anthraquinonedimethane;[30] Li 2 Q, lithiated p-benzoquinone;[31] PTTCA, poly(trithiocyanuric acid) [32]. The full names of electrolyte salts are listed below: LiTFSI, lithium bis(trifluoromethanesulphonyl)imide; NaOTf, sodium trifluoromethanesulfonate; NaFSI, sodium bis(fluorosulfonyl)imide; LLZTO, Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 .…”