Evaluation Study for Large Prismatic Lithium-Ion Cell ... - NREL

Electrode-Scale Performance Model
Charge Transfer Kinetics at Reaction Sites
Species Conservation
Charge Conservation
( φ − ) −U
η = φ
s
e
• Pioneered by Newman group (Doyle, Fuller,
and Newman 1993)
• Captures lithium diffusion dynamics and charge
transfer kinetics
• Predicts current/voltage response of a battery
• Provides design guide for thermodynamics,
kinetics, and transport across electrodes
Energy Conservation • Difficult to resolve heat and electron current
∂T
ρc
p = ∇ ⋅(
k∇T
)
transport
+ q′
′
∂t
Li ⎛
∂U
eff
eff
eff
q′ ′
⎞
= j ⎜φs
−φ
e −U
+ T ⎟ + σ ∇φs
⋅∇φ
s + κ ∇φe
⋅∇φ
e + κ D ∇lnc
e ⋅∇φ
e
⎝
∂T
⎠
National Renewable Energy Laboratory 8
Innovation for Our Energy Future
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