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Capacity Fade Studies in LixSi, LixGe, LixAl, and LixSn Electrodes

Bernard, Christopher
http://rave.ohiolink.edu/etdc/view?acc_num=osu1574462338470697

Abstract Details

2019, Master of Science, Ohio State University, Chemistry.
Lithium ion batteries (LIB’s) have obtained an important role in the field of electronics used these days. Its been used for many applications such as cell phones, laptops and electric tools. However, LIB’s presents challenges for larger storage technology such as electric vehicles, requiring higher capacity, safety operation and portable energy storage. This has led to the investigation of possible anode materials such as Si, Sn, Al, and Ge materials, which forms stable intermetallic compound with lithium through several highly lithiated phases, obtaining 3 to 10 times more of Lithium storage capacity at their highest lithiated phase (Li4.25Si, Li4.25Ge, Li2.25Al, Li4.25Sn) compared to graphite. Although these are ideal replacement for graphite in anode material, they suffer from volume expansion which leads to capacity fade and poor battery performance. Due to their high theoretical capacity of 4056 mAh/g (Li4.25Si), 1568 mAh/g (Li4.25Ge), 2235 mAh/g (Li2.25Al), and 960 mAh/g (Li4.25Sn), their capacity fade is carefully investigated. These capacity fade per cycle are not attributed to particle cracking; instead, particles lose contact with carbon/PVDF binder. These disconnecting particles are associated with large decrease in diameter during delithiation; specifically, during the intermetallic phase with largest volume expansion. The addition of carbon black has shown to decrease the probability of particle disconnection; hence, increasing the battery performance.
Anne Co (Advisor)
89 p.
Analytical Chemistry
Capacity Fade; intermetallic phases, nanoparticles; particle disconnection;

Recommended Citations

Citations

  • Bernard, C. (2019). Capacity Fade Studies in LixSi, LixGe, LixAl, and LixSn Electrodes [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1574462338470697

    APA Style (7th edition)

  • Bernard, Christopher. Capacity Fade Studies in LixSi, LixGe, LixAl, and LixSn Electrodes. 2019. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1574462338470697.

    MLA Style (8th edition)

  • Bernard, Christopher. "Capacity Fade Studies in LixSi, LixGe, LixAl, and LixSn Electrodes." Master's thesis, Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1574462338470697

    Chicago Manual of Style (17th edition)

osu1574462338470697
283
© 2019, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.