Electrochemical cell including functionally graded and architectured components and methods
Electrochemical cells or batteries featuring functional gradations, and having desirable, periodic configurations, and methods for making the same. One or more methods, in alone or in combination, are utilized to fabricate components of such electrochemical cells or batteries, which are designed to achieve certain thermal, mechanical, kinetic and spatial characteristics, and their effects, singly and in all possible combinations, on battery performance. The thermal characteristics relate to temperature distribution during charge and discharge processes. The kinetic characteristics relate to rate performance of the cells or batteries such as the ionic diffusion process and electron conduction. The mechanical characteristics relate to lifetime and efficiency of the cells or batteries such as the strength and moduli of the component materials. Finally, the spatial characteristics relate to the energy and power densities, stress and temperature mitigation mechanisms, and diffusion and conduction enhancements. The electrochemical cells or batteries constructed according to the methods presented in this invention are useful for all applications that require high rate performance, high energy/power density, good durability, high safety and long lifetime.
1. A method for fabricating an electrode for an electrochemical cell, the method comprising: providing a substrate member having a predetermined periodic spatial pattern; depositing a thickness of material using one or more species overlying the predetermined periodic spatial pattern in a conformal manner, the thickness of material being characterized as a nanocomposite structure having an average feature size of about 500 nanometers and less; adjusting one or more parameters related to the deposition during a time period associated with the deposition of the thickness of material from a first spatial region of the thickness of material to a second spatial region of the thickness of material; and outputting an electrode element having a graded feature of one or more characteristics from the first spatial region to the second spatial region.
2. The method of claim 1 , wherein the electrodes are formed using at least one technique from the group of evaporation, physical vapor deposition (PVD), chemical vapor deposition, low pressure chemical vapor deposition (LPCVD), atomic layer deposition (ALD), direct laser writing (DLW), sputtering, radio frequency magnetron sputtering, microwave plasma enhanced chemical vapor deposition (MPECVD), pulsed laser deposition (PLD), nanoimprint, ion implantation, laser ablation, spray deposition, spray pyrolysis, spray coating or plasma spraying.
3. The method of claim 1 , further comprises adding a non liquid electrolyte for an electrochemical cell using the electrode element, the non-liquid electrolyte being made using a process selected from physical vapor deposition, laser deposition, centrifuge, spinning, microwave, thermal gradient, sintering, spray deposition, and chemical vapor deposition.
4. The method of claim 3 , wherein an anode element, the electrolyte, and a cathode member are deposited sequentially or in reverse order.
5. The method of claim 1 , wherein the one or more characteristics is selected from an intensive property including mass density, energy density, power density, composition, concentration, thermallelectroniclionic conductivities, thermallionic diffusivities, maximum strain, ultimate strength, moduli, ductility, and plasticity.
6. The method of claim 1 , wherein the electrode element is characterized by an optimized morphology created for neutralizing internal stresses, stopping crack growth, maximizing material strength, and stabilizing active material structure in anode, electrolyte, cathode and current collectors.
7. The method of claim 1 , further comprising a refresh process to reintroduce the graded feature of one or more characteristics from the first spatial region to the second spatial region if the graded feature is diminished from the first spatial region to the second spatial region.
8. The method of claim 1 , wherein the predetermined periodic spatial pattern is an electrode design, the electrode design being provided by a mathematical process.
9. The method of claim 8 , wherein the mathematical process uses a minimization or maximization of an intensive characteristic from within an allowed set of material characteristics.
10. The method of claim 9 , wherein the mathematical process is selected from at least a surrogate-base analysis, genetic algorithm, adaptive topology optimization, design of experiments, ANOVA/MANOVA, basin based analysis, solid isotropic microstructure with intermediate mass penalization (SIMP), power penalized stiffness model, topology optimization of continuum structure, normal boundary intersection (NB I) optimization method, multivariable optimization method, or multidisciplinary design optimization.
11. The method of claim 1 , wherein the depositing and adjusting is provided in a deposition chamber.
12. The method of claim 11 , wherein the deposition chamber is provided to output a complete battery.
13. A method for fabricating an electrochemical cell, the method comprising: providing a substrate member having a predetermined periodic spatial pattern;
depositing a first thickness of material using one or more species overlying the predetermined periodic spatial pattern in a conformal manner, the first thickness of material being characterized as a nanocomposite structure having an average feature size of about 500 nanometers and less;
adjusting one or more parameters related to the deposition during a time period associated with the deposition of the first thickness of material from a first spatial region of the first thickness of material to a second spatial region of the first thickness of material to form a first electrode element having a graded feature of one or more characteristics from the first spatial region to the second spatial region; forming an electrolyte overlying the first electrode element; and forming a second electrode element overlying the electrolyte.
14. The method of claim 13 , wherein the first electrode element, the second electrode element, and the electrolyte are provided within one or more deposition chambers.
15. The method of claim 13 , wherein the first electrode element is a cathode and the second electrode element is an anode.
16. The method of claim 13 , wherein the first electrode element is an anode and the second electrode element is a cathode.
17. The method of claim 13 , further comprising depositing an anode current collector and a cathode current collector.
18. The method of claim 13 , wherein the first electrode element, the electrolyte, and the second electrode element are deposited sequentially.
19. The method of claim 13 , wherein the first electrode element, the electrolyte, and the second electrode element are deposited sequentially and continuously without breaking vacuum.
20. The method of claim 13 , further comprising providing a separator between the first electrode element and the second electrode element.
21. The method of claim 20 , wherein the separator is provided within the electrolyte.
22. A method for fabricating an electrode for an electrochemical cell, the method comprising: providing a substrate member having a predetermined periodic spatial pattern and comprising a current collector; depositing a thickness of material using one or more species overlying a surface region of the substrate member, the thickness of material being characterized as a nanocomposite material; adjusting one or more parameters during a time period associated with the depositing of the thickness of material from a first spatial region of the thickness of material to a second spatial region of the thickness of material; and causing formation of an electrode element having a graded feature of one or more characteristics from the first spatial region to the second spatial region.