Answered step by step
Verified Expert Solution
Question
1 Approved Answer
( 2 0 + extra 5 1 0 0 There are two eminent processes involved in lithiation of graphite ( L i + intercalation into
extra There are two eminent processes involved in lithiation of graphite intercalation into graphite as shown below: penetration into solidelectrolyte interface SEI layer, in the SEI layer intercalated into graphite.
e
To investigate the effect of an additive called VC two different half cells are built up Both of them consisted of graphite as a working electrode and lithium metal as a counter electrode with a lithium ioncontaining electrolyte. The first cell as a control did not include VC in its electrolyte VC while the second one has VC Then, the following Nyquist plot was obtained with those cells.
ideal gas constant
at room temperature
for and for I.
Faraday constant ole
ACEEChem.HyunKon Song
final.
Name:
Based on the eminent processes described above, an equivalent circuit would be used to interpret the impedance data. The following equivalent circuit consists of two parts responsible for SEI penetration and intercalation.
where resistor ohm and CPE or constant phase element with no unit
Guess values of parameters of each element without using software. Assume CPE can be replaced by a pure capacitor that is to say, Fill out the table below. You should show how you can obtain your guess in your answer book.
tableVCVCRsCPESE: TCPEsel: PRSElCPEd: TCPE : PRctWct: TWct: P
What is the effect or function of You can deduce your own conclusion from comparing the parameter values between and
Step by Step Solution
There are 3 Steps involved in it
Step: 1
Get Instant Access to Expert-Tailored Solutions
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
Step: 3
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get Started