1 / 29

Jason Riley and Julian Eastoe School of Chemistry University of Bristol

the secret chemistry of the mobile phone. Jason Riley and Julian Eastoe School of Chemistry University of Bristol. powerhouse battery. communications display. phone demo. history. a 90’s idea?. a wish list. the mobile phone battery. reversible environmentally friendly

akiko
Télécharger la présentation

Jason Riley and Julian Eastoe School of Chemistry University of Bristol

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. the secret chemistry of the mobile phone Jason Riley and Julian Eastoe School of Chemistry University of Bristol powerhouse battery communications display phone demo

  2. history a 90’s idea?

  3. a wish list the mobile phone battery • reversible • environmentally friendly • - high rate of discharge • - fast charge • - long cycle life • - small watt hours per kg • watt hours per cm3

  4. energy chemical → heat/light 2CH3OH + 3O2→ 2CO2 + 4H2O

  5. corrosion splitting a reaction in two 2H+ + 2e  H2 Zn  Zn2+ + 2e Zn + 2HCl → ZnCl2 + H2 Zn + 2H+→ Zn2+ + H2

  6. energy chemical → electrical 2H+ + 2e  H2 Zn  Zn2+ + 2e Zn + 2H+→ Zn2+ + H2

  7. the battery a modern idea?

  8. the early days death of the pony express Cu2+ + 2e  Cu Zn  Zn2+ + 2e Zn + Cu2+→ Zn2+ + Cu

  9. recharging electrolysis 2H+ + 2e → H2 Cu  Cu2+ + 2e 2H+ + Cu → H2 + Cu2+

  10. mobility the lead acid battery PbO2 + Pb + 2H2SO4 2PbSO4 + 2H2O

  11. portability the simple battery Zn + 2H+→ Zn2+ + H2

  12. stability the one with the copper top anode: Zn → Zn2+ + 2e Zn + 2OH-→ Zn(OH)2 + 2e cathode: 2MnO2to Mn2O3 Zn + 2MnO2 + H2O → Zn(OH)2 + Mn2O3

  13. materials chemistry the mobile phone battery H+ is small  moves fast problem 2H+ + 2e H2 concept

  14. the phone battery metal hydrides MH NiOOH Ni(OH)2 M NiOOH + H+ + e → Ni(OH)2 MH → M + H++ e NiOOH + H2O + e → Ni(OH)2 + OH- NiOOH + MH → Ni(OH)2 + M NiOOH + MH ← Ni(OH)2 + M MH + OH-→ M + H2O+ e

  15. genius inventor of the lcd george gray

  16. liquid crystals key to the electronics revolution

  17. the importance of shape liquid crystals made simple CN is it a . . . . or is it a ?

  18. the importance of shape organisation

  19. liquid crystals fish-shaped molecules CN

  20. liquid crystals fish-shaped molecules

  21. liquid crystal displays sandwich-like structure

  22. liquid crystal displays twisted stacks of molecules

  23. liquid crystal displays electrically activated optical switch current off current on transparent dark

  24. fuel cells the future

  25. electroluminescent displays the future flexible emissive technology wide viewing angle low voltage fast switching high brightness low cost

  26. thank you thank you http://www.howstuffworks.com http://www.chm.bris.ac.uk/lectures/mobilephone.htm

More Related