Hyperpolarized 129Xe nuclear magnetic resonance study of mesoporous silicon sponge materials
- Resource Type
- Authors
- Russell Hopson; Yougang Mao; Li-Qiong Wang; Dokyoung Kim; Jinmyoung Joo; Michael J. Sailor
- Source
- Journal of Materials Research. 32:3038-3045
- Subject
- Materials science
Macropore
Silicon
020209 energy
Mechanical Engineering
chemistry.chemical_element
02 engineering and technology
021001 nanoscience & nanotechnology
Condensed Matter Physics
Characterization (materials science)
Anode
Nuclear magnetic resonance
chemistry
Mechanics of Materials
0202 electrical engineering, electronic engineering, information engineering
Particle
General Materials Science
Lithium
0210 nano-technology
Porosity
Mesoporous material
- Language
- ISSN
- 2044-5326
0884-2914
Mesoporous silicon sponge (MSS) is considered as a promising anode material for lithium ion batteries because of its preformed meso/macro porous structures that can accommodate large volume expansion during the lithiation process and its superior electrochemical performance. Temperature dependent hyperpolarized (HP) 129Xe NMR was applied to characterize the structure and porosity of MSS materials with varying pores and particle sizes. Our results reveal irregular pore structures with the presence of micropores inside the larger meso/macropore channels and each MSS material has its own characteristic pore environment with a varying degree of nonuniformity and connectivity of pores. This study demonstrates that HP 129Xe NMR is a potentially useful tool for providing a fingerprint of the structure and connectivity of the pores for each material, complementary to other characterization techniques.