Polysulfide Flow Batteries Enabled by Percolating Nanoscale Conductor Networks

被引：208

作者：

Fan, Frank Y. ^{[1
]}

Woodford, William H. ^{[1
]}

Li, Zheng ^{[1
]}

Baram, Nir ^{[1
]}

Smith, Kyle C. ^{[1
]}

Helal, Ahmed ^{[2
]}

McKinley, Gareth H. ^{[2
]}

Carter, W. Craig ^{[1
]}

Chiang, Yet-Ming ^{[1
]}

机构：

[1] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA

[2] MIT, Dept Mech Engn, Cambridge, MA 02139 USA

来源：

NANO LETTERS | 2014年 / 14卷 / 04期

基金：

美国国家科学基金会;

关键词：

Nanoparticle; percolation; battery; electrochemistry; lithium sulfur; flow battery; SULFUR BATTERIES; ENERGY-STORAGE; EFFICIENCY; PARTICLES; CATHODE;

D O I：

10.1021/nl500740t

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A new approach to flow battery design is demonstrated wherein diffusion-limited aggregation of nanoscale conductor particles at similar to vol % concentration is used to impart mixed electronic-ionic conductivity to redox solutions, forming flow electrodes with embedded current collector networks that self-heal after shear. Lithium polysulfide flow cathodes of this architecture exhibit electrochemical activity that is distributed throughout the volume of flow electrodes rather than being confined to surfaces of stationary current collectors. The nanoscale network architecture enables cycling of polysulfide solutions deep into precipitation regimes that historically have shown poor capacity utilization and reversibility and may thereby enable new flow battery designs of higher energy density and lower system cost. Lithium polysulfide half-flow cells operating in both continuous and intermittent flow mode are demonstrated for the first time.

引用

页码：2210 / 2218

页数：9

共 31 条

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