Zhang T, Zhang D, Balakrishna AR .
Journal of the Mechanics and Physics of Solids 183, 105501. (2024)
Synopsis
We present a multiscale theoretical framework to investigate the interplay between diffusion and finite lattice deformation in phase transformation materials. In this framework, we use the Cauchy-Born Rule and the Principle of Virtual Power to derive a thermodynamically consistent theory with an application to intercalation-type battery electrodes.
Pahlani G, Balakrishna AR , James RD.
Journal of the Mechanics and Physics of Solids , 105361. (2023)
Synopsis
We investigate the fundamental mechanisms underlying high-strain-rate plastic deformation and friction in crystalline materials using a novel implementation of Objective Molecular Dynamics.
Zhang D, Renuka Balakrishna A.
Acta Materialia Volume 252. (2023)
Synopsis
We develop a theoretical framework to predict structural transformations in intercalation compounds and establish crystallographic design rules necessary for forming shape-memory-like microstructures in intercalation materials.
Santos A, Rezaei S, Zhang D, Luo Y, Lin B, Renuka Balakrishna A, Xi BX, Banerjee S.
Chemical Science, 14 (3), 458-484. (2022)
Synopsis
This perspective highlights the coupling between electrochemistry, mechanics, and geometry spanning key electrochemical processes in intercalating positive electrodes.
Schofield P, Luo Y, Zhang D, Zaheer W, Santos D, Agbeworvi G, Ponis JD, Handy JV, Andrews JL, Braham EJ, Renuka Balakrishna A, Banerjee S.
ACS Energy Letters 7, 3286-92. (2022)
Synopsis
We dope a phase-transforming V2O5 electrode to reduce structural distortions during charge/discharge processes.
Renuka Balakrishna A.
Journal of Electrochemical Energy Conversion and Storage 19(4), 040802. (2022)
Synopsis
We review how the structural transformation of lattices, phase transformation microstructures, and crystallographic defects affect the chemo-mechanical properties of intercalation materials.
Renuka Balakrishna A.
Physical Review Materials 6, 074402. (2022)
Synopsis
We propose a mathematical relationship between magnetic material constants for which highly reversible microstructures form during phase transformations.
Renuka Balakrishna A, James RD.
NPJ Computational Materials 8(4), 1-10. (2022)
Synopsis
We quantitatively demonstrate that the delicate balance between magnetocrystalline anisotropy, magnetostriction constants, and the spike-domain microstructure (localized disturbance) is necessary to lower magnetic coercivity.
Zhang D, Sheth J, Sheldon, BW, Renuka Balakrishna A.
Journal of the Mechanics and Physics of Solids 155, 104551. (2021)
Synopsis
We demonstrate how film straining of intercalation electrodes can circumvent its structural degradation upon repeated cycling.
Renuka Balakrishna A, James RD.
Applied Physics Letters 118(21), 212404. (2021)
Synopsis
We propose a solution to the longstanding “Permalloy problem”, i.e., why the particular composition of Fe21.5Ni78.5 achieves a dramatic drop in magnetic hysteresis.
Renuka Balakrishna A, James RD.
Acta Materialia 116697. (2021)
Synopsis
We develop a novel coericity tool that for the fist time combines micromagnetics with magnetostriction and non-linear stability analysis.
Renuka Balakrishna A, Chiang YM, Carter WC.
Physical Review Materials 3(6), 065404. (2019)
Synopsis
We use our previously developed multiscale phase-field framework to model electrode microstructures not only as a function of Li composition, but also predict the crystallographic features of the underlying electrode during battery operation.
Christensen CK, Mamakhel A, Renuka Balakrishna A, Iversen BB, Chiang YM, Ravnsbæk D.
Nanoscale 11, 12347-12357. (2019)
Synopsis
Using ex situ and operando scattering techniques we elucidate the phase transformation in LixTiO2 during repeated charge-discharge processes.
Bucci G, Talamini B, Renuka Balakrishna A, Chiang YM, Carter WC.
Physical Review Materials 2(10), 105407. (2018)
Synopsis
We use the cohesive-energy approach to analyze the delamination criterion and derive a stability condition
for fracture propagation at electrode-electrolyte interfaces in solid-state batteries.
Muench I, Renuka Balakrishna A, Huber JE.
Archive of Applied Mechanics 89(6), 955-972. (2018)
Synopsis
We identify the boundary conditions necessary to stabilize 3D domain patterns with long, ribbon-like domains threaded through them and with vortex-like features.
Renuka Balakrishna A, Carter WC.
Physical Review E 97(4), 043304. (2018)
Synopsis
We introduce, for the first time, a theoretical framework that combines a Cahn-Hilliard and a phase-field crystal model to describe a phase transition process.
Renuka Balakrishna A, Huber JE.
Smart Materials and Structures 25(10), 104001. (2016)
Synopsis
We find that simple domain patterns with stripe-like features are stable across a wide range of externally imposed strains, and explore its application in a thin film energy harvester.
Renuka Balakrishna A, Huber JE, Muench I.
Physical Review B 93(17), 174120. (2016)
Synopsis
We investigate the stability and evolution of periodic domain patterns in the form of multirank laminates in ferroelectrics. In contrast to previous findings using a linear, constrained theory, we find that these laminates are unstable at the nanoscale because of significant domain-wall energy.
Renuka Balakrishna A, Muench I, Huber JE.
ASME 2015 Conference on Smart Materials, Adaptive Structures and Intelligent Systems SMASIS2015-8823, V001T02A001. (2016)
Renuka Balakrishna A, Huber JE.
Applied Physics Letters 106(9), 092906. (2015)
Synopsis
We provide a fundamental insight into the absence of experimental observation of classic polarization vortices of the form described by Kittel. Using phase-field calculations, we show that scale and surface conditions greatly affects the stability of polarization vortices making them energetically unfavorable at the fine scale.