SONY's NEW NEXELION HYBRID LITHIUM ION BATTERIES

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SONY's NEW NEXELION HYBRID LITHIUM ION BATTERIES

• Sundeep Kumar
• Elisa Alonso
• Anjuli Appapillai

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Introduction
Positive Materials LiCoO2, LiMn2O4, Li(Ni,Mn)O2,
LiFePO4, V2O5, etc. Negative Material Carbon,
Graphite Electrolyte liquid 1M LiPF6 in DMCEC
solvent or hybrid gel polymer
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Sonys Nexelion Claims

• 50 volumetric capacity increase in negative
  electrode
• 30 overall volumetric capacity increase in
  system
• same charging voltage as conventional battery
• improved low temperature capacity
• 90 of capacity can be discharged in 30 minutes

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Comparing Sonys New Battery

• Item Conventional Battery (14430G6) Nexelion
  (14430W1)
• Anode material Graphite (Carbon) Tin based
  Amorphous material
• Cathode material Lithium Cobalt
  oxide Multi-stage composite cathode (Mixtur
  e of cobalt, manganese, nickel oxides and
  Lithium Cobalt oxide)
• Electrolyte Hybrid electrolyte Newly
  developed hybrid electrolyte
• Size Diameter 14mm x Height 43mm Diameter
  14mm x Height 43mm
• Capacity 700mAh, 2.6Wh 900mAh, 3.1Wh
  diameter
• Standard charging voltage 4.2V - 3V 4.2V - 2.5V
• Energy Density 395Wh/l, 144 Wh/kg 478Wh/l,
  158 Wh/kg
• Weight 18 g 20 g

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Anode - Lithium Storage in Metal Alloys

• Increase in Capacity -gt compare theoretical
  capacity

Theoretical Capacity nF MW
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Anode - Lithium Storage in Metal Alloys

• Volume expansion buffered with inactive materials
  
• integrity of electrode maintained
• electrochemical performance maintained through
  cycling
• Sony amorphous Sn anode?

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Cathode Multistage Composite

• LiCoO2 (Mn, Ni, Co)O2
• Typical Voltages
• Li CoO2 LiCoO2 _at_3.9V
• 0.11Li4.4Sn Li0.5CoO2 LiCoO2 0.11Sn _at_3.4V
• (Ref.Linden, Shao-Horn)
• High voltage cathode ? Sony-developed