Jason Staub

Michael W. Forney; Matthew J. Ganter; Jason Staub; Richard D. Ridgley; Brian J. Landi

Stabilized lithium metal powder (SLMP) has been applied during battery assembly to effectively prelithiate high capacity (1500-2500 mAh/g) silicon-carbon nanotube (Si-CNT) anodes, eliminating the 20-40% first cycle irreversible capacity loss. Pressure-activation of SLMP is shown to enhance prelithiation and enable capacity matching between Si-CNT anodes and lithium nickel cobalt aluminum oxide (NCA) cathodes in full batteries with minimal added mass. The prelithiation approach enables high energy density NCA/Si-CNT batteries achieving >1000 cycles at 20% depth-of-discharge.

Michael W. Forney; M. J. Dzara; A. L. Doucett; Matthew J. Ganter; Jason Staub; R. D. Ridgley; Brian J. Landi

The morphology, thermal stability, impedance, and rate performance of germanium nanoparticle (Ge-NP) based lithium ion battery electrodes that incorporate single-walled carbon nanotube (SWCNT) conductive additives has been systematically studied for varying SWCNT loadings (1–3% w/w SWCNT) and electrode areal capacities (4–12 mA h cm−2). Scanning electron microscopy (SEM) was used to characterize the surface coverage for carbon black and SWCNT conductive additives. Differential scanning calorimetry (DSC) analysis shows a 30% reduction in exothermic release with SWCNT conductive additives, which demonstrates improved thermal stability for Ge-NP electrodes. Electrochemical impedance spectroscopy (EIS) indicates that the charge transfer impedance can be reduced roughly 2.5× when comparing 5% carbon black to ≤3% SWCNT conductive additive. Electrochemical cycling and rate testing demonstrate that SWCNT conductive additives provide significantly improved specific capacities (1100 mA h g−1 with 1% SWCNT) and rate performance (80% capacity retention at effective 1 C rate) over traditional carbon black conductive additives when using Ge-NP active material. In addition to the benefits for thermal stability, impedance, and rate performance, predicted energy density gains from Ge-NP anodes can be up to 20–25% in full batteries.

Michael W. Forney; Roberta A. DiLeo; Alan Raisanen; Matthew J. Ganter; Jason Staub; Reginald E. Rogers; Richard D. Ridgley; Brian J. Landi

Roberta A. DiLeo; Matthew J. Ganter; Melissa Thone; Michael W. Forney; Jason Staub; Reginald E. Rogers; Brian J. Landi

Reginald E. Rogers; Garry M. Clarke; Olivia N. Matthew; Matthew J. Ganter; Roberta A. DiLeo; Jason Staub; Michael W. Forney; Brian J. Landi

Christopher M. Schauerman; Jack Alvarenga; Jason Staub; Michael W. Forney; Ryan Foringer; Brian J. Landi

K.R. Crompton; Jason Staub; M.P. Hladky; Brian J. Landi

Michael W. Forney; Roberta A. DiLeo; Alan Raisanen; Matthew J. Ganter; Jason Staub; Reginald E. Rogers; Brian J. Landi

Kyle R. Crompton; Michael Hladky; Jason Staub; Brian J. Landi

Brian J. Landi; Matthew J. Ganter; Christopher M. Schauerman; Kyle R. Crompton; Anthony Leggiero; Jason Staub