Protection of battery electrodes against side reactions
A battery electrode composition is provided that comprises composite particles. Each of the composite particles in the composition (which may represent all or a portion of a larger composition) may comprise a porous electrode particle and a filler material. The porous electrode particle may comprise active material provided to store and release ions during battery operation. The filler material may occupy at least a portion of the pores of the electrode particle. The filler material may be liquid and not substantially conductive with respect to electron transport.
1. A first battery electrode composition, comprising:
a first composite particle comprising a first porous electrode particle, a first active material capable of storing and releasing ions during battery operation, and a first filler material occupying at least a portion of one or more pores of the first porous electrode particle,
wherein the first filler material is not substantially conductive with respect to electron transport, and
wherein the first filler material comprises one or more markers, the one or more markers capable of distinguishing the first filler material of the first battery electrode composition from one or more other filler materials of one or more other battery electrode compositions via respective spectroscopic or spectrometric signals.
2. A battery electrode composition arrangement, comprising:
the first battery electrode composition of claim 1 ; and
a second battery electrode composition comprising a second composite particle, the second composite particle comprising a second porous electrode particle, a second active material capable of storing and releasing ions during battery operation, and a second filler material occupying at least a portion of one or more pores of the second porous electrode particle,
wherein the second filler material comprises at least one marker, the one or more markers of the first filler material being distinguishable from the at least one marker of the second filler material via the respective spectroscopic or spectrometric signals.
3. The battery electrode composition arrangement of claim 2 , wherein the first active material of the first battery electrode composition is the same as the second active material of the second battery electrode composition.
4. The battery electrode composition arrangement of claim 2 , wherein the first active material of the first battery electrode composition is different than the second active material of the second battery electrode composition.
5. The first battery electrode composition of claim 1 , wherein the first filler material is configured to substantially prevent direct contact between the first active material and at least one component of an electrolyte capable of being used in a battery cell once the first battery electrode composition is made part of an electrode of the battery cell.
6. The first battery electrode composition of claim 5 , wherein the at least one component comprises an electrolyte solvent.
7. The first battery electrode composition of claim 1 , wherein the spectroscopic or spectrometric signals are detectable by Raman spectroscopy, Fourier transform infrared (FTIR) spectroscopy, energy dispersive X-ray spectroscopy (EDS), secondary emission mass spectrometry (SIMS), fluorescence, nuclear magnetic resonance (NMR) spectroscopy, X-ray photoelectron spectroscopy, isotope-ratio mass spectrometry (IRMS), or any combination thereof.
8. The first battery electrode composition of claim 1 , wherein the one or more markers comprise one or more salts, one or more dyes, one or more oligomers, one or more polymers, one or more quantum dots, one or more nanoparticles, or any combination thereof.
9. The first battery electrode composition of claim 1 , wherein the one or more markers are stable during battery operation.
10. The first battery electrode composition of claim 1 , wherein the first filler material exhibits an electrical conductivity of less than about 10 −6 S/cm.
11. The first battery electrode composition of claim 1 , wherein the first active material comprises silicon.
12. The first battery electrode composition of claim 1 , wherein the first active material comprises a metal-fluoride-based material.
13. The first battery electrode composition of claim 1 , wherein the first porous electrode particle exhibits a porosity in the range from about 2 vol. % to about 70 vol. %.
14. The first battery electrode composition of claim 1 , wherein the first porous electrode particle exhibits a specific surface area in the range from about 5 m 2 /g to about 3000 m 2 /g.
15. The first battery electrode composition of claim 1 , wherein the first porous electrode particle exhibits pore dimensions in the range from about 0.4 nm to about 40 nm.
16. The first battery electrode composition of claim 1 , wherein the first porous electrode particle comprises conductive carbon.
17. The first battery electrode composition of claim 1 , wherein the first filler material is at least partially fluorinated or sulfonated.
18. The first battery electrode composition of claim 1 , wherein the first filler material comprises a Li salt.