Production of Quasi-2D Platelets of Nonlayered Iron Pyrite (FeS2) by Liquid-Phase Exfoliation for High Performance Battery Electrodes

被引：59

作者：

Kaur, Harneet ^{[1
,2
,3
]}

Tian, Ruiyuan ^{[1
,2
,3
]}

Roy, Ahin ^{[4
]}

McCrystall, Mark ^{[1
,2
,3
]}

Horvath, Dominik Valter ^{[1
,2
,3
]}

Onrubia, Guillermo Lozano ^{[5
]}

Smith, Ross ^{[1
,2
,3
]}

Ruether, Manuel ^{[4
]}

Griffin, Aideen ^{[1
,2
,3
]}

Backes, Claudia ^{[5
]}

Nicolosi, Valeria ^{[4
]}

Coleman, Jonathan N. ^{[1
,2
,3
]}

机构：

[1] Trinity Coll Dublin, CRANN Res Ctr, Dublin D2, Ireland

[2] Trinity Coll Dublin, AMBER Res Ctr, Dublin D2, Ireland

[3] Trinity Coll Dublin, Sch Phys, Dublin D2, Ireland

[4] Trinity Coll Dublin, Sch Chem, Dublin D2, Ireland

[5] Heidelberg Univ, Chair Appl Phys Chem, D-69120 Heidelberg, Germany

来源：

ACS NANO | 2020年 / 14卷 / 10期

基金：

爱尔兰科学基金会; 欧洲研究理事会;

关键词：

iron pyrite; nonlayered material; liquid-phase exfoliation; surface passivation; lithium ion battery; REDUCED GRAPHENE OXIDE; HIGH-YIELD PRODUCTION; LITHIUM-ION; ANODE MATERIAL; SOLVOTHERMAL SYNTHESIS; NANOCRYSTALLINE FES2; MOLYBDENUM-DISULFIDE; CARBON NANOTUBES; HIGH-CAPACITY; BAND-GAP;

D O I：

10.1021/acsnano.0c05292

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Over the past 15 years, two-dimensional (2D) materials have been studied and exploited for many applications. In many cases, 2D materials are formed by the exfoliation of layered crystals such as transition-metal disulfides. However, it has recently become clear that it is possible to exfoliate nonlayered materials so long as they have a nonisotropic bonding arrangement. Here, we report the synthesis of 2D-platelets from the earth-abundant, nonlayered metal sulfide, iron pyrite (FeS2), using liquid-phase exfoliation. The resultant 2D platelets exhibit the same crystal structure as bulk pyrite but are surface passivated with a density of 14 x 10(18) groups/m(2). They form stable suspensions in common solvents and can be size-selected and liquid processed. Although the platelets have relatively low aspect ratios (similar to 5), this is in line with the anisotropic cleavage energy of bulk FeS2. We observe size-dependent changes to optical properties leading to spectroscopic metrics that can be used to estimate the dimensions of platelets. These platelets can be used to produce lithium ion battery anodes with capacities approaching 1000 mAh/g.

引用

页码：13418 / 13432

页数：15