کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7887953 | 1509790 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of calcination temperature on morphology and electrochemical performance of PbLi2Ti6O14
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
As a promising anode material, PbLi2Ti6O14 has attracted the attention of many researchers. In this work, a series of PbLi2Ti6O14 are prepared by solid state method at five different calcination temperatures and used as anode materials in lithium ion batteries. Through a series of tests, the results show that the phase purity, morphology and electrochemical performance of PbLi2Ti6O14 can be seriously influenced by calcination temperature. When the calcination temperature is 900â¯Â°C, the phase-pure PbLi2Ti6O14 can be obtained with relatively small particle size, excellent cycle performance and outstanding lithium ion diffusion behavior. It provides an initial charge capacity of 151.3â¯mAâ¯hâ¯gâ1 at 100â¯mAâ¯gâ1. After 100 cycles, it shows a reversible capacity of 142.0â¯mAâ¯hâ¯gâ1 with superior capacity retention of 93.85%. In contrast, PbLi2Ti6O14 formed at 800â¯Â°C displays an unsatisfactory performance due to the presence of impurity, even though it has the smallest particle size and the largest lithium ion diffusion coefficient among the five samples. The reversible capacity is only 82.6â¯mAâ¯hâ¯gâ1 after 100 cycles with capacity retention of 53.9%. In order to further study the lithium ion diffusion behavior of PbLi2Ti6O14, the in-situ X-ray diffraction technique is also implemented. It is found that during the lithiation/delithiation process, the stable framework can effectively inhibit the volume change and ensures the excellent electrochemical performance of PbLi2Ti6O14.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 8, 1 June 2018, Pages 9506-9513
Journal: Ceramics International - Volume 44, Issue 8, 1 June 2018, Pages 9506-9513
نویسندگان
Jundong Zhang, Haoxiang Yu, Nengbing Long, Tingting Liu, Xing Cheng, Runtian Zheng, Haojie Zhu, Wuquan Ye, Jie Shu,