سنتز و بررسی خواص الکترولیت حالت جامد لیتیم آلومینیوم تیتانیوم فسفات هادی یون لیتیم

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناس ارشد مهندسی مواد – سرامیک، دانشگاه صنعتی شریف

2 دانشیار گروه سرامیک دانشگاه صنعتی شریف

چکیده

در دو دهه اخیر باتری‌های لیتیم-هوا به علت چگالی انرژی بالا بسیار مورد توجه قرار گرفته‌اند. الکترولیت‌های حالت جامد با هدایت یونی بالا یکی از مهم‌ترین چالش‌ها در ساخت این نوع‌ باتری‌ها به حساب می‌آیند. لیتیم آلومینیوم تیتانیوم فسفات (LATP) نوعی الکترولیت ناسیکونی است که به علت هدایت یونی بالا در باتری‌‌های لیتیم-هوا کاربرد یافته است. هدف از پژوهش حاضر ساخت غشاء هادی یون لیتیم LATP بوده است. به این ترتیب ابتدا پودر LATP به روش شیمیایی سنتز شده و دمای تبلور مناسب با بررسی الگوی پراش نمونه‌ها انتخاب گردید. پس از آن جهت ساخت غشاء نمونه‌ها در دو فشار پرس و دو زمان زینتر متفاوت و در دمای زینتز ℃850 تهیه شدند و اثر این عوامل بر هدایت یونی و دانسیته این نمونه‌ها بررسی گردید. بررسی‌ها نشان دادند که پودر LATP بدون فازهای ناخالصی با روش گفته شده با موفقیت سنتز شد و بهترین کریستالینیتی با آنیل کردن پودر در دمای ℃800 به دست آمد. همچنین بیشترین هدایت یونی به دست آمده مربوط به نمونه پرس شده با فشار Mpa50 و زمان زینتر 3 ساعت و برابر با S.cm-1 10-4×07/1 است. بیشترین دانسیته به دست آمده نیز مربوط به نمونه پرس شده با فشار Mpa50 و زمان زینتر 12 ساعت است.

کلیدواژه‌ها

عنوان مقاله [English]

synthesis and investigation of solid electrolyte ion conducting lithium aluminium titanium phosphate

نویسندگان [English]

  • samin toofan 1
  • Ali Nemati 2
1 sharif university of technology
2 Department of Materials Science & Engineering, Sharif University of Technology, Tehran, Iran
چکیده [English]

Lithium-air battery has been a focus of study for the past two decades due to their high theoretical energy density. Solid state electrolytes with high ion conuducting capability still remains a critical challenge in developing lithium-air batteries. Lithium aluminium titanium phosphate with high ion conducting properties and NASICON structure is a hopeful material as solid electrolyte. In this study we have prepared LATP powders by a solution based synthesis method continued by annealing to obtain convenient crystallinity without impurities. Preferred Crystallization temperature was determined to be 800 °C by x-ray diffraction analysis. . The milled powder was used to form pellets, which was then calcined 850 °C for two level of pressing pressure and sintering time. Highest ionic conductivity of 1.07×10-4 was abtained by pressing pressure of 50 Mpa and duel time of 3 hours. Although highest density refered to pressing pressure of 300 Mpa and 3 hours duel time.

کلیدواژه‌ها [English]

  • ionic conductivity
  • NASICON
  • solid state electrolyte

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سابقه مقاله

  • تاریخ دریافت: 11 خرداد 1397
  • تاریخ بازنگری: 10 اردیبهشت 1398
  • تاریخ پذیرش: 02 تیر 1398

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