Peter V Sushko

Publications (2)23.78 Total impact

• Source

  Available from: Xilin Chen

  Article: Dendrite-Free Lithium Deposition via Self-Healing Electrostatic Shield Mechanism.

  Fei Ding, Wu Xu, Gordon L Graff, Jian Zhang, Maria Sushko, Xilin Chen, Yuyan Shao, Mark H Engelhard, Zimin Nie, Jie Xiao, Xingjiang Liu, Peter V Sushko, Jun Liu, Ji-Guang Zhang
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  ABSTRACT: Rechargeable lithium metal batteries are considered the "holy grail" of energy storage systems. Unfortunately, uncontrollable dendritic lithium growth inherent in these batteries (upon repeated charge/discharge cycling) has pre-vented their practical application over the past 40 years. We show a novel mechanism which can fundamentally alter dendrite formation. At low concentrations, selected cations (such as cesium or rubidium) exhibit an effective reduction potential below the standard reduction potential of lithium ions. During lithium deposition, these additive cations form a positively-charged electrostatic shield around the initial growth tip of the protuberances without reduction and deposition of the additives. This forces further deposition of lithium to adjacent regions of the anode and eliminates dendrite formation in lithium-metal batteries. This strategy may also prevent dendrite growth in lithium-ion batteries as well as other metal batteries and transform the surface uniformity of coatings deposited in many general electrodeposition processes.
  Journal of the American Chemical Society 02/2013; · 9.91 Impact Factor
• Source

  Available from: Daiwon Choi

  Article: High-performance LiNi0.5Mn1.5O4 spinel controlled by Mn3+ concentration and site disorder.

  Jie Xiao, Xilin Chen, Peter V Sushko, Maria L Sushko, Libor Kovarik, Jijun Feng, Zhiqun Deng, Jianming Zheng, Gordon L Graff, Zimin Nie, Daiwon Choi, Jun Liu, Ji-Guang Zhang, M Stanley Whittingham
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  ABSTRACT: The complex correlation between Mn(3+) ions and the disordered phase in the lattice structure of high voltage spinel, and its effect on the charge transport properties, are revealed through a combination of experimental study and computer simulations. Superior cycling stability is achieved in LiNi(0.45)Cr(0.05)Mn(1.5)O(4) with carefully controlled Mn(3+) concentration. At 250th cycle, capacity retention is 99.6% along with excellent rate capabilities.
  Advanced Materials 03/2012; 24(16):2109-16. · 13.88 Impact Factor