About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Materials for Energy Conversion and Storage VII
|
Presentation Title |
Designing Electrode Architectures across Length Scales: Some Lessons Learned from Li-ion and “Beyond Li” Chemistries |
Author(s) |
Sarbajit Banerjee |
On-Site Speaker (Planned) |
Sarbajit Banerjee |
Abstract Scope |
The design and operation of rechargeable batteries is predicated on orchestrating flows of mass, charge, and energy across multiple interfaces. Understanding such flows requires knowledge of atomistic and mesoscale diffusion pathways and the coupling of ion transport with electron conduction across length scales. Using multiple polymorphs of V2O5 as model systems, I will discuss our efforts to develop an Angstrom-level view of diffusion pathways using a combination of single-crystal X-ray diffraction and density functional theory calculations. Scanning transmission X-ray microscopy and ptychography imaging provides a means of mapping the accumulative results of atomic scale inhomogeneities at mesoscale dimensions and further enables tracing of stress gradients across individual particles. The mitigation of diffusion impediments will be discussed with reference to two distinct approaches: (a) utilization of Riemann manifolds as a geometric design principle for electrode architectures and (b) the atomistic design of polymorphs with well-defined diffusion pathways that provide frustrated coordination. The latter approach has led to the discovery of promising intercalation hosts for both multivalent and anion batteries. |
Proceedings Inclusion? |
Planned: |