New Insights into Decoupled Cation and Anion Transport and Dynamic Heterogeneity in a Diethyl(methyl)(isobutyl)phosphonium Hexafluorophosphate Organic Ionic Plastic Crystal

TY - JOUR

T1 - New Insights into Decoupled Cation and Anion Transport and Dynamic Heterogeneity in a Diethyl(methyl)(isobutyl)phosphonium Hexafluorophosphate Organic Ionic Plastic Crystal

AU - Zhu, Haijin

AU - Huang, Gongyue

AU - O'Dell, Luke A.

AU - Forsyth, Maria

N1 - Publisher Copyright: © 2021 American Chemical Society.

PY - 2021/10/14

Y1 - 2021/10/14

N2 - Organic ionic plastic crystals (OIPCs) are an emerging family of materials with demonstrated applications in electrochemical devices such as lithium/sodium ion batteries, dye-sensitized solar cells, and hydrogen fuel cells. Herein, we present direct evidence of anion diffusion through a relatively static background of a cation lattice in an ionic plastic crystal compound, [P122i4][PF6], in an elevated temperature solid phase. We found all anions are diffusive, whereas only a small population of cations is diffusive. Two anion populations were identified with diffusion coefficients differing by 2 orders of magnitude. The slow-diffusing anion is attributed to the plastic crystal region where the cation forms a relative static background, allowing anions to diffuse possibly through a defect-assisted hopping mechanism.

AB - Organic ionic plastic crystals (OIPCs) are an emerging family of materials with demonstrated applications in electrochemical devices such as lithium/sodium ion batteries, dye-sensitized solar cells, and hydrogen fuel cells. Herein, we present direct evidence of anion diffusion through a relatively static background of a cation lattice in an ionic plastic crystal compound, [P122i4][PF6], in an elevated temperature solid phase. We found all anions are diffusive, whereas only a small population of cations is diffusive. Two anion populations were identified with diffusion coefficients differing by 2 orders of magnitude. The slow-diffusing anion is attributed to the plastic crystal region where the cation forms a relative static background, allowing anions to diffuse possibly through a defect-assisted hopping mechanism.

UR - http://www.scopus.com/inward/record.url?scp=85117250636&partnerID=8YFLogxK

U2 - 10.1021/acs.jpclett.1c02943

DO - 10.1021/acs.jpclett.1c02943

M3 - 文章

C2 - 34606277

AN - SCOPUS:85117250636

SN - 1948-7185

VL - 12

SP - 9853

EP - 9858

JO - Journal of Physical Chemistry Letters

JF - Journal of Physical Chemistry Letters

IS - 40

ER -