C/Si Composite Anodes for Advanced Lithium Ion Batteries

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Efforts to Engineer Silicon forLi-Ion Battery Anodes• Nanoscale particle size – effectively extendslife, but Oswald ripening and agglomerationlead to capacity fade and high surface arearesults in SEI formation and largeirreversible capacity loss• Graphite carbon matrix or coatings– alsoeffective, but capacity fade still needsimprovement and SEI growth an issueTDAR e s e a r c h
Si/C Composites+ xLi+-xLi +SiLi x SiHard carbon matrix with encapsulated silicon• Prevent SEI layer formation/re-formation on Si particles• Provide highly conductive matrix• Prevent agglomeration of dispersed Si particlesProprietary – TDA ResearchTDAR e s e a r c h
Page 1 and 2: NASA Battery WorkshopHuntsville, AL
Page 3 and 4: TDA Research, Inc.www.tda.comWheat
Page 5 and 6: History of Commercial SuccessTDA’
Page 7 and 8: Engineered Pore-SizeOptimizes Perfo
Page 9: Silicon as an Anode• 4200 mAh/g c
Page 13 and 14: Synopsis of Work EffortThere were t
Page 15 and 16: Started with Control CarbonsFired a
Page 17 and 18: Process Conditions Changed toReduce
Page 19 and 20: Initial Si-nano Controls AlsoShowed
Page 21 and 22: Dispersion of NanoSi Resultedin The
Page 23 and 24: Carbon Stabilized Si CapacityCapaci
Page 25 and 26: Type 2 Carbon Has BetterCapacity Fa
Page 27 and 28: Power is Dependent onLoading Level
Page 29 and 30: Cycle Life Will Be Focus ofFuture E
Page 31 and 32: Economic Analysis FavorsLarger Part
Page 33: Thanks to NASA JSC for FundingNASA

C/Si Composite Anodes for Advanced Lithium Ion Batteries

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