Batteries are everywhere. From personal electronics to electric vehicles to grid-scale energy storage, the ability to store energy in a compact form has become a vital part of society. Our efforts in this area focus on enabling next-generation (Beyond Li-ion) technologies through improved fundamental understanding of battery behavior, new materials/manufacturing approaches, and rational design of 3D architectures. We utilize a suite of operando electrochemical techniques to gain insight into the coupled morphological evolution and electrochemical behavior of electrode materials as they change dynamically during cycling. The mechanistic understanding gained through this approach has allowed us to predict performance and failure modes without disassembling a cell, enabling rapid screening and design of materials/electrodes with superior performance. To manufacture these new materials, we focus on interfacial designs utilizing thin protective coatings, surface treatments, and 3D architectures to enable improved cycle life, higher rates of charge, and enhanced safety. We utilize a wide range of characterization techniques to observe electrode morphology, composition, phase, mechanical behavior, optical properties, and electrochemical performance, as interfacial performance in battery systems depends on a complex and highly interconnected set of properties, requiring an interdisciplinary approach to research.
(1) A. Sharafi, E. Kazyak, A. L. Davis, S. Yu, T Thompson, D. J. Siegel, N. P. Dasgupta, J. Sakamoto, “Surface Chemistry Mechanism of Ultra-Low Interfacial Resistance in the Solid-State Electrolyte Li7La3Zr2O12” Chem. Mater. 29, 7961 (2017) [link]
(2)E. Kazyak, K.-H. Chen, K. N. Wood, A. L. Davis, T. Thompson, A.R. Bielinski, A. J. Sanchez, X. Wang, C. Wang, J. Sakamoto, N. P. Dasgupta, “Atomic Layer Deposition of the Solid Electrolyte Garnet Li7La3Zr2O12“Chem. Mater. 29, 3785 (2017) [link]
(3) K.-H. Chen, K. N. Wood, E. Kazyak, W. S. LePage, A. L. Davis, A. J. Sanchez, N. P. Dasgupta, “Dead Lithium: Mass Transport Effects on Voltage, Capacity, and Failure of Lithium Metal Anodes” J. Mater. Chem. A 5, 11671 (2017) [link]
(4) K. N. Wood, M. Noked, N. P. Dasgupta, “Lithium Metal Anodes: Toward an Improved Understanding of Coupled Morphological, Electrochemical, and Mechanical Behavior” ACS Energy Lett. 2, 664 (2017) [link]
(5) K. N. Wood, E. Kazyak, A. F. Chadwick, K. H. Chen, J. G. Zhang, K. Thornton, N. P. Dasgupta, “Dendrites and Pits: Untangling the Complex Behavior of Lithium Metal Anodes through Operando Video Microscopy”, ACS Central Science 2, 790 (2016). [link]
(6) E. Kazyak*, K. N. Wood* and N. P. Dasgupta, “Improved Cycle Life and Stability of Lithium Metal Anodes through Ultrathin Atomic Layer Deposition Surface Treatments”, Chem. Mater. 27, 6457 (2015). [link]