Laser Raman spectrum of the dichloroiodinium (ICl2+) cation

et al. 2022

Angew Chem Int Ed

A single-electron transfer mode coupled with the shuttle behavior of organic iodine batteries results in insufficient capacity, a low redox potential, and poor cycle durability. Sluggish kinetics are well known in conventional lithium-iodine (LiÀ I) batteries, inferior to other conversion congeners. Herein, we demonstrate new two-electron redox chemistry of I À /I + with inter-halogen cooperation based on a developed haloid cathode. The new iodide-ion conversion battery exhibits a state-of-art capacity of 408 mAh gI À 1 with fast redox kinetics and superior cycle stability. Equipped with a newly emerged 3.42 V discharge voltage plateau, a recorded high energy density of 1324 Wh kgI À 1 is achieved. Such robust redox chemistry is temperature-insensitive and operates efficiently at À 30 °C. With systematic theoretical calculations and experimental characterizations, the formation of ClÀ I + species and their functions are clarified.

Section: Resultsmentioning

confidence: 98%

Section: Spectral Analysis Of Two-electron Transfer Chemistrymentioning

confidence: 99%

Two‐Electron Redox Chemistry Enabled High‐Performance Iodide‐Ion Conversion Battery

Wang

et al. 2022

Angew Chem Int Ed

Section: Resultsmentioning

confidence: 98%

Section: Spectral Analysis Of Two-electron Transfer Chemistrymentioning

confidence: 99%

Two‐Electron Redox Chemistry Enabled High‐Performance Iodide‐Ion Conversion Battery

Wang

et al. 2022

Angewandte Chemie

A single‐electron transfer mode coupled with the shuttle behavior of organic iodine batteries results in insufficient capacity, a low redox potential, and poor cycle durability. Sluggish kinetics are well known in conventional lithium–iodine (Li−I) batteries, inferior to other conversion congeners. Herein, we demonstrate new two‐electron redox chemistry of I−/I+ with inter‐halogen cooperation based on a developed haloid cathode. The new iodide‐ion conversion battery exhibits a state‐of‐art capacity of 408 mAh gI−1 with fast redox kinetics and superior cycle stability. Equipped with a newly emerged 3.42 V discharge voltage plateau, a recorded high energy density of 1324 Wh kgI−1 is achieved. Such robust redox chemistry is temperature‐insensitive and operates efficiently at −30 °C. With systematic theoretical calculations and experimental characterizations, the formation of Cl−I+ species and their functions are clarified.

“…60, oP80, 60d 8 c 3 a)w ith a = 11.9269 (7), b = 11.5370 (7), c = 12.0640(6) , V = 1660.01(16) 3 , Z = 8a t1 00 K. Interestingly, the compound is not isotypic to the previously reported [Br 3 ] [AsF 6 ]( space group P " 1). [101] We note that the cell volume is ap- [85][86][87][88] [Cl 4 ] + [89] [ClF 2 ] + , [90][91][92] [Cl 2 F] + , [87,93,94] [ClF 4 ] + , [95,96] [99][100][101] [Br 5 ] + [101,102] [BrF 2 ] + , [103,104] [BrF 4 ] + , [105,106] [BrF 6 ] + , [107] [Br 2 F 5 ] + , [12] [Br 3 F 8 ] + [12] [100,108,109] [I 5 ] + , [109] [I 7 ] + (unsure) [110] [I 4 ] 2 + , [111,112] [IF 2 ] + , [114] [ICl 2 ] + , [115,116] [IBrCl] + , [117] [IBr 2 ] + , [118] [I 2 Cl] + (unsure), [119] [I 2 Br] + , [120] [IF 4 ] + , [105] [I 3 Cl 2 ] + , [119] [IF 6 ] + , [121] [I 4 Cl 3 ] + (unsure),…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of [Br₃][MF₆] (M=Sb, Ir), as well as Quantum Chemical Study of [Br₃]⁺ Structure, Chemical Bonding, and Relativistic Effects Compared with [XBr₂]⁺ (X=Br, I, At, Ts) and [TsZ₂]⁺ (Z=F, Cl, Br, I, At, Ts)

Ivlev

Gaul

et al. 2019

Chemistry A European J

[Br3][SbF6] and [Br3][IrF6] were synthesized by interaction of BrF3 with Sb2O3 or iridium metal, respectively. The former compound crystallizes in the orthorhombic space group Pbcn (No. 60) with a=11.9269(7), b=11.5370(7), c=12.0640(6) Å, V=1660.01(16) Å3, Z=8 at 100 K. The latter compound crystallizes in the triclinic space group Ptrue1‾ (No. 2) with a=5.4686(5), b=7.6861(8), c=9.9830(9) Å, α=85.320(8), β=82.060(7), γ=78.466(7)°, V=406.56(7) Å3, Z=2 at 100 K. Both compounds contain the cation [Br3]+, which has a bent structure and is coordinated by octahedron‐like anions [MF6]− (M=Sb, Ir). Experimentally obtained cell parameters, bond lengths, and angles are confirmed by solid‐state DFT calculations, which differ from the experimental values by less than 2 %. Relativistic effects on the structure of the tribromonium(1+) cation are studied computationally and found to be small. For the heaviest analogues containing At and Ts, however, pronounced relativistic effects are found, which lead to a linear structure of the polyhalogen cation.