Summary

Строительство и испытания монет клетки литий-ионных батарей

Published: August 02, 2012
doi:

Summary

Протокол для построения и тестирования монеты клетки литий-ионных батарей описан. Конкретные процедуры принятия рабочего электрода, подготовке контр электрод, монтаж ячейки внутри перчаточного ящика и тестирования ячейки представлены.

Abstract

Rechargeable lithium ion batteries have wide applications in electronics, where customers always demand more capacity and longer lifetime. Lithium ion batteries have also been considered to be used in electric and hybrid vehicles1 or even electrical grid stabilization systems2. All these applications simulate a dramatic increase in the research and development of battery materials3-7, including new materials3,8, doping9, nanostructuring10-13, coatings or surface modifications14-17 and novel binders18. Consequently, an increasing number of physicists, chemists and materials scientists have recently ventured into this area. Coin cells are widely used in research laboratories to test new battery materials; even for the research and development that target large-scale and high-power applications, small coin cells are often used to test the capacities and rate capabilities of new materials in the initial stage.

In 2010, we started a National Science Foundation (NSF) sponsored research project to investigate the surface adsorption and disordering in battery materials (grant no. DMR-1006515). In the initial stage of this project, we have struggled to learn the techniques of assembling and testing coin cells, which cannot be achieved without numerous help of other researchers in other universities (through frequent calls, email exchanges and two site visits). Thus, we feel that it is beneficial to document, by both text and video, a protocol of assembling and testing a coin cell, which will help other new researchers in this field. This effort represents the “Broader Impact” activities of our NSF project, and it will also help to educate and inspire students.

In this video article, we document a protocol to assemble a CR2032 coin cell with a LiCoO2 working electrode, a Li counter electrode, and (the mostly commonly used) polyvinylidene fluoride (PVDF) binder. To ensure new learners to readily repeat the protocol, we keep the protocol as specific and explicit as we can. However, it is important to note that in specific research and development work, many parameters adopted here can be varied. First, one can make coin cells of different sizes and test the working electrode against a counter electrode other than Li. Second, the amounts of C black and binder added into the working electrodes are often varied to suit the particular purpose of research; for example, large amounts of C black or even inert powder were added to the working electrode to test the “intrinsic” performance of cathode materials14. Third, better binders (other than PVDF) have also developed and used18. Finally, other types of electrolytes (instead of LiPF6) can also be used; in fact, certain high-voltage electrode materials will require the uses of special electrolytes7.

Protocol

1. Подготовка рабочего электрода Приготовить смесь из ~ 6 мас. % Поливинилиденфторида (PVDF) связующего в N-метил-2-пирролидон (NMP). Взвесить 80 мас. % Активного вещества (LiCoO 2 в данном случае) и 10 мас. % С черный (ацетилен, 99,9 +%), а затем смешать их в вихрь в течение 1 мин. Добави?…

Discussion

По нашему опыту, наиболее важным шагом в подготовке рабочего электрода делает хорошие суспензии с консистенцией. Как показано на рисунке 4, превышение NMP в суспензии может привести к трещины покрытия, в то время как недостаточная NMP может привести к пористым покрытием. В работе,…

Disclosures

The authors have nothing to disclose.

Acknowledgements

Мы выражаем глубокую признательность поддержке программы керамики в отдел Материалы исследований Национального научного фонда США, в рамках гранта нет. DMR-1006515 (руководитель программы доктор Lynnette D. Madsen).

Materials

Name of the reagent Company Catalogue number
Poly(vinylidene fluoride) Sigma-Aldrich 182702
1-Methyl-2-pyrrolidinone, 99.5% Alfa Aesar 31903
LiCoO2 Alfa Aesar 42090
Carbon black, acetylene, 99.9+% Alfa Aesar 39724
LiPF6 in EC:DMC:DEC MTI Corporation EQ-Be-LiPF6
Celgard separator Celgard C480
Analog Vortex Mixer VWR 58816-121
Vacuum oven    
Vacuum pump    
Hydraulic press    
Coin cell case MTI Corporation EQ-CR2032-CASE-304
Spring and spacer MTI Corporation EQ-CR20SprSpa-304
Glovebox mBraun UNILAB
Battery tester Arbin Instruments BT2143

References

  1. Cairns, E. J., Albertus, P. Batteries for Electric and Hybrid-Electric Vehicles. Annual Review of Chemical and Biomolecular Engineering. 1, 299-320 (2010).
  2. Dunn, B., Kamath, H., Tarascon, J. -. M. Electrical Energy Storage for the Grid: A Battery of Choices. Science. 334, 928-935 (2011).
  3. Goodenough, J. B. Cathode materials: A personal perspective. J. Power Sources. 174, 996-1000 (2007).
  4. Yamada, A., Chung, S. C., Hinokuma, K. Optimized LiFePO4 for lithium battery cathodes. Journal of the Electrochemical Society. 148, A224-A229 (2001).
  5. Whittingham, M. S. Lithium batteries and cathode materials. Chemical Reviews. 104, 4271-4301 (2004).
  6. Tarascon, J. M., Armand, M. Issues and challenges facing rechargeable lithium batteries. Nature. 414, 359-367 (2001).
  7. Goodenough, J. B., Kim, Y. Challenges for Rechargeable Li Batteries. Chemical Materials. 22, 587-603 (2010).
  8. Ceder, G. Identification of cathode materials for lithium batteries guided by first-principles calculations. Nature. 392, 694-696 (1998).
  9. Chung, S. Y., Bloking, J. T., Chiang, Y. M. Electronically conductive phospho-olivines as lithium storage electrodes. Nature Materials. 1, 123-128 (2002).
  10. Bruce, P. G., Scrosati, B., Tarascon, J. M. Nanomaterials for rechargeable lithium batteries. Angewandte Chemie-International Edition. 47, 2930-2946 (2008).
  11. Arico, A. S., Bruce, P., Scrosati, B., Tarascon, J. M., Van Schalkwijk, W. Nanostructured materials for advanced energy conversion and storage devices. Nature Materials. 4, 366-377 (2005).
  12. Hochbaum, A. I., Yang, P. D. Semiconductor Nanowires for Energy Conversion. Chemical Reviews. 110, 527-546 (2010).
  13. Wang, Y., Cao, G. Z. Developments in nanostructured cathode materials for high-performance lithium-ion batteries. Advanced Materials. 20, 2251-2269 (2008).
  14. Kang, B., Ceder, G. Battery materials for ultrafast charging and discharging. Nature. 458, 190-193 (2009).
  15. Liu, J., Manthiram, A. Improved Electrochemical Performance of the 5 V Spinel Cathode LiMn1.5Ni0.42Zn0.08O4 by Surface Modification. Journal of the Electrochemical Society. 156, A66-A72 (2009).
  16. Kayyar, A., Qian, H. J., Luo, J. Surface adsorption and disordering in LiFePO4 based battery cathodes. Applied Physics Letters. 95, (2009).
  17. Sun, K., Dillon, S. J. A mechanism for the improved rate capability of cathodes by lithium phosphate surficial films. Electrochemistry Communications. 13, 200-202 (2011).
  18. Kovalenko, I. A Major Constituent of Brown Algae for Use in High-Capacity Li-Ion Batteries. Science. 333, 75-79 (2011).

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Cite This Article
Kayyar, A., Huang, J., Samiee, M., Luo, J. Construction and Testing of Coin Cells of Lithium Ion Batteries. J. Vis. Exp. (66), e4104, doi:10.3791/4104 (2012).

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