بهینه‌سازی فرایند انحلال انتخابی لیتیم از باتری لیتیم- یون مستعمل توسط اگزالیک اسید با به‌کارگیری روش رویه پاسخ

نویسندگان

1 1- آزمایشگاه فرایندهای نوین استخراج فلزات و بازیافت، دانشکده مهندسی مواد و متالورژی، دانشگاه علم و صنعت ایران

2 2- دانشکده مهندسی مواد و متالورژی، دانشگاه علم و صنعت ایران

3 3- گروه باتری و سنسور، مرکز تحقیقات مواد و انرژی

چکیده

در این پژوهش، بازگردانی باتری لیتیم- یون از نوع LiNixMnyCozO2 با هدف بازیابی لیتیم از کاتد باتری، مورد آزمایش قرار گرفته است. پس از دشارژ و پیاده‌سازی اجزای باتری، کاتد با استفاده از یک خردکن تا ابعاد زیر پنج میلی‌متر ریز شد. سپس آلومینیوم محتوی با انحلال در محلول سدیم هیدروکسید 5/2 مولار تحت شرایط دمای محیط و زمان دو ساعت به‌طور انتخابی از ماده کاتدی حذف شد. در مرحله بعد انحلال انتخابی لیتیم از ماده کاتدی آلومینیومزدایی شده توسط اگزالیک اسید با استفاده از روش رویه پاسخ (طرح مرکب مرکزی) بررسی شد. سه پارامتر زمان (100-35 دقیقه)، دما (70-40 درجه سانتی‌گراد) و غلظت اگزالیک اسید (2/1-5/0 مولار) به‌عنوان متغیرهای کنترل شده و درصد بازیابی لیتیم و غلظت منگنز در محلول به‌عنوان متغیرهای پاسخ انتخاب شدند. درنهایت با تجزیه و تحلیل آماری نتایج و مدل های تعیین شده، شرایط بهینه (زمان 122 دقیقه، دمای 70 درجه سانتی‌گراد و غلظت اگزالیک اسید 1/1 مولار) پیش بینی شد و تحت این شرایط، بازیابی لیتیم حدود 95 درصد و منگنز حل‌شده به میزان حدود 110 میلی‌گرم بر لیتر به‌دست آمد.

کلیدواژه‌ها

عنوان مقاله [English]

Optimization of the Selective Dissolution of Li from the Spent Li-ion Batteries using Oxalic Acid by a Response Surface Methodology

نویسندگان [English]

  • H. Mirzaaei ghasabe 1
  • A. Zakeri 1
  • Sh. Mirdamadi 2
  • M. Ghorbanzadeh 3
1 1. Metal Extraction Research Laboratory, School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, Iran.
2 2. School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, Iran.
3 3. Battery and Sensor Group, Materials and Energy Research Center.
چکیده [English]

In this study, the recovery of lithium from the cathode of the spent Li-ion batteries of the LiNixMnyCozO2 type was investigated. After complete discharging and dismantling, the cathodic section was cut and its aluminum content was selectively dissolved in 2.5 M NaOH solution at room temperature for 2 hr. In the next step, selective dissolution of lithium by oxalic acid from the de-aluminized cathode material was investigated and optimized using the response surface methodology of  the central composite design. The effect of three parameters of time (35-100 min), temperature (40-70 °C), and oxalic acid  concentration (0.5-1.2 M) on the lithium recovery percentage and manganese concentration was studied as the response variables. According to the statistical analysis of the results and the developed models, an optimum condition (T = 70 °C, t = 122 min and oxalic acid concentration of 1.1 M) was suggested and verified experimentally, resulting in the lithium recovery of about 95% and Mn2+ concentration of about 110 mg/L.

کلیدواژه‌ها [English]

  • Recycling
  • Spent Li-ion battery
  • Selective dissolution
  • design of experiments
  • Oxalic Acid

مراجع

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مواد پیشرفته در مهندسی
دوره 37، شماره 3
آذر 1397
صفحه 87-105

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