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CSTR系統(tǒng)制備高性能Ni0.6Co0.2Mn0.2(OH)2及電化學(xué)性能研究
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大連海事大學(xué) 交通運(yùn)輸工程學(xué)院

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國(guó)家自然科學(xué)基金資助(51479019,21476035)；中央高?；究蒲袠I(yè)務(wù)費(fèi)(3132016341)


Synthesization and electrochemical properties of Ni0.6Co0.2Mn0.2(OH)2 ternary cathodes for lithium batteries in the system of CSTR
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Institute of Traffic and Transportation Engineering,Dalian Maritime University,Dalian

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    摘要:

    采用共沉淀法在CSTR(連續(xù)攪拌反應(yīng)器系統(tǒng))工藝體系中批量合成出鎳鈷錳三元?dú)溲趸锴膀?qū)體Ni0.6Co0.2Mn0.2(OH)2 (622)，摻入適量的Li2CO3高溫焙燒后得到鋰離子二次電池正極材料Li[Ni0.6Co0.2Mn0.2]O2。使用掃描電子顯微鏡(SEM)觀察樣品形貌，X射線衍射儀(XRD)及透射電子顯微鏡(TEM)分析合成樣品的具體結(jié)構(gòu)，充放電循環(huán)測(cè)試系統(tǒng)測(cè)試其電化學(xué)性能。SEM測(cè)試表明產(chǎn)物為二次粒子團(tuán)聚而成類球形顆粒；XRD及TEM結(jié)果表明合成的樣品具有典型的層狀α-NaFeO2結(jié)構(gòu)。在電壓范圍為2.8 V-4.3 V，0.2 C倍率條件下，首次充放電容量分別為206 mAh g-1 和176 mAh g-1，100次循環(huán)后容量保持率達(dá)到85%。

    Abstract:

    Ni0.6Co0.2Mn0.2(OH)2 as precursor of lithium-ion batteries ternary cathode material was prepared for batch preparation by a hydroxyl co-precipitation method in the system of CSTR (continuous stirred tank reactor). Then, the Ni0.6Co0.2Mn0.2(OH)2 was roasted with Li2CO3 to receive Li[Ni0.6Co0.2Mn0.2]O2 under high temperature in the air. Scanning electron microscope (SEM), X-ray diffraction (XRD) and Transmission electron microscope (TEM) were used to examine the morphology and structure of the obtained Li[Ni0.6Co0.2Mn0.2]O2. The resulting Li[Ni0.6Co0.2Mn0.2]O2 powders have a type of spherical structure composed of secondary particles with a typical α-NaFeO2 lamellar structure. The electrochemical tests indicate that this cathode material have a good electrochemical reversibility and much better cycling stability in the voltage range of 2.8 and 4.3 V. Its initial charge and discharge specific capacity are as high as 206 mAh g-1 and 176 mAh g-1 at 0.2 C, with a capacity retention rate of 85% after 100 cycles．

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崔永福,崔金龍,滿建宗,程付鵬,張鵬超,李 嵩,文鐘晟,孫俊才. CSTR系統(tǒng)制備高性能Ni0.6Co0.2Mn0.2(OH)2及電化學(xué)性能研究[J].稀有金屬材料與工程,2019,48(2):587~593.[Cui Yongfu, Cui Jinlong, Man Jianzong, Cheng Fupeng, Zhang Pengchao, Li Song, Wen Zhongsheng, Sun Juncai. Synthesization and electrochemical properties of Ni0.6Co0.2Mn0.2(OH)2 ternary cathodes for lithium batteries in the system of CSTR[J]. Rare Metal Materials and Engineering,2019,48(2):587~593.]
DOI：10.12442/j. issn.1002-185X.20170603

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  • 收稿日期:2017-07-08
  • 最后修改日期:2017-10-27
  • 錄用日期:2017-11-08
  • 在線發(fā)布日期: 2019-03-15
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