Helena Hebecker
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View article: The Effect of LiFePO<sub>4</sub> Particle Size and Surface Area on the Performance of LiFePO<sub>4</sub>/Graphite Cells
The Effect of LiFePO<sub>4</sub> Particle Size and Surface Area on the Performance of LiFePO<sub>4</sub>/Graphite Cells Open
In an effort to better understand capacity loss mechanisms in LiFePO 4 (LFP)/graphite cells, this work considers carbon-coated LFP materials with different surface area and particle size. Cycling tests at room temperature (20 °C) and eleva…
View article: Li[Ni<sub>0.5</sub>Mn<sub>0.3</sub>Co<sub>0.2</sub>]O<sub>2</sub> as a Superior Alternative to LiFePO<sub>4</sub> for Long-Lived Low Voltage Li-Ion Cells
Li[Ni<sub>0.5</sub>Mn<sub>0.3</sub>Co<sub>0.2</sub>]O<sub>2</sub> as a Superior Alternative to LiFePO<sub>4</sub> for Long-Lived Low Voltage Li-Ion Cells Open
Single crystal Li[Ni 0.5 Mn 0.3 Co 0.2 ]O 2 //graphite (NMC532) pouch cells with only sufficient graphite for operation to 3.80 V (rather than ≥4.2 V) were cycled with charging to either 3.65 V or 3.80 V to facilitate comparison with LiFeP…
View article: The Use of LiFSI and LiTFSI in LiFePO<sub>4</sub>/Graphite Pouch Cells to Improve High-Temperature Lifetime
The Use of LiFSI and LiTFSI in LiFePO<sub>4</sub>/Graphite Pouch Cells to Improve High-Temperature Lifetime Open
The use of LiPF 6 in Li-ion battery electrolytes provides sufficient stability, conductivity, and cost in most applications. However, LiPF 6 has also been known to cause degradation in Li-ion cells, primarily from its thermal decomposition…
View article: A Systematic Study of Electrolyte Additives in Single Crystal and Bimodal LiNi<sub>0.8</sub>Mn<sub>0.1</sub> Co<sub>0.1</sub>O<sub>2</sub>/Graphite Pouch Cells
A Systematic Study of Electrolyte Additives in Single Crystal and Bimodal LiNi<sub>0.8</sub>Mn<sub>0.1</sub> Co<sub>0.1</sub>O<sub>2</sub>/Graphite Pouch Cells Open
A few weight percent of electrolyte additives can dramatically improve Li-ion battery performance and lifetime. A systematic investigation of a series of electrolyte additive formulations was performed on bimodal (BM) and single crystal (S…
View article: Performance and Degradation of LiFePO<sub>4</sub>/Graphite Cells: The Impact of Water Contamination and an Evaluation of Common Electrolyte Additives
Performance and Degradation of LiFePO<sub>4</sub>/Graphite Cells: The Impact of Water Contamination and an Evaluation of Common Electrolyte Additives Open
LiFePO 4 (LFP) is an appealing cathode material for Li-ion batteries. Its superior safety and lack of expensive transition metals make LFP attractive even with the commercialization of higher specific capacity materials. In this work the p…
View article: A Comparison of the Performance of Different Morphologies of LiNi<sub>0.8</sub>Mn<sub>0.1</sub>Co<sub>0.1</sub>O<sub>2</sub> Using Isothermal Microcalorimetry, Ultra-High Precision Coulometry, and Long-Term Cycling
A Comparison of the Performance of Different Morphologies of LiNi<sub>0.8</sub>Mn<sub>0.1</sub>Co<sub>0.1</sub>O<sub>2</sub> Using Isothermal Microcalorimetry, Ultra-High Precision Coulometry, and Long-Term Cycling Open
Ni-rich positive electrode materials for Li-ion batteries have the dual benefit of achieving high energy density while reducing the amount of Co used in cells. However, limitations in cycle life are still an issue for the widespread adopti…