Preparation of LixMn2O4 Spinels by in-situ Redox Precipitation Hydrothermal Synthesis Process

Abstract

Abstract: Li_xMn₂O₄ spinels were prepared by in-situ redox precipitation hydrothermal synthesis method, and characterized by XRD, BET, TGA, TEMand SEMetc. , and the effects of many factors on the properties of as-prepared Li_xMn₂O₄ samples were investigated. The results demonstrated that Li_xMn₂O₄ spinels can be synthesized under milder conditions by in-situ redox precipitation hydrothermal synthesis method. Li_xMn₂O₄ spinels are cubic and symmetrical, and have a better stability at less than 700℃, their surface areas and particle sizes were strongly affected by crystallization temperature and time, pH value, calcination temperature and time. The optimal conditions of Li_xMn₂O₄ synthesis were determined as follows: the alkalinity(pHvalue) was 9; the crystallization temperature and time were more than 240 ℃ and 48 h, respectively; the calcination temperature and time were between 700-750 ℃ and 6-12 h, respectively; the molar ratio of Li to Mn was less than 1.2/2.

Key words: Hydrothermal synthesis, in-situ redox precipitation, Spinel, Li_xMn₂O₄

CLC Number:

O614

TrendMD:

LIU Xing-Quan, CHEN Zhao-Yong, LI Shu-Hua, HE Ze-Zhen, YU Zuo-Long . Preparation of Li_xMn₂O₄ Spinels by in-situ Redox Precipitation Hydrothermal Synthesis Process[J]. Chem. J. Chinese Universities, 2002, 23(2): 179.

[1]	LI Xiaohui, WEI Aijia, MU Jinping, HE Rui, ZHANG Lihui, WANG Jun, LIU Zhenfa. Effects of SmPO₄Coatingon Electrochemical Performance of High-voltage LiNi_0.5Mn_1.5O₄Cathode Materials [J]. Chem. J. Chinese Universities, 2022, 43(2): 20210546.
[2]	LIANG Yu, LIU Huan, GONG Lige, WANG Chunxiao, WANG Chunmei, YU Kai, ZHOU Baibin. Synthesis and Supercapacitor Properties of Biimidazole-modified ｛SiW₁₂O₄₀｝ Hybrid [J]. Chem. J. Chinese Universities, 2022, 43(1): 20210556.
[3]	ZHANG Nan, HAN Kuo, LI Yue, WANG Chunru, ZHAO Feng, HAN Dongxue, NIU Li. Core-shell Heterostructure Construction Between Thiospinel CuCo₂S₄ and MoS₂ for Improved Hydrogen Evolution Electrocatalytic Performance [J]. Chem. J. Chinese Universities, 2021, 42(4): 1307.
[4]	ZHANG Huishuang, GAO Yanxiao, WANG Qiuxian, LI Xiangnan, LIU Wenfeng, YANG Shuting. High-low Temperature Properties of Ni-rich LiNi_0.6Co_0.2Mn_0.2O₂ Cathode Material by Hydrothermal Synthesis with CTAB Assisted [J]. Chem. J. Chinese Universities, 2021, 42(3): 819.
[5]	WANG Ye, ZHANG Xiaosi, SUN Lijing, LI Bing, LIU Lin, YANG Miao, TIAN Peng, LIU Zhongyi, LIU Zhongmin. Morphology Control of SAPO Molecular Sieves under the Assistance of Organosilane [J]. Chem. J. Chinese Universities, 2021, 42(3): 683.
[6]	WANG Jianyu, ZHANG Qiang, YAN Wenfu, YU Jihong. Roles of Hydroxyl Radicals in Zeolite Synthesis [J]. Chem. J. Chinese Universities, 2021, 42(1): 11.
[7]	WU Qinming, WANG Yeqing, MENG Xiangju, XIAO Fengshou. Reconsideration of Crystallization Process for Aluminosilicate Zeolites [J]. Chem. J. Chinese Universities, 2021, 42(1): 21.
[8]	XIANG Houzheng, XIE Hongxiang, LI Wenchao, LIU Xiaolei, MAO Aiqin, YU Haiyun. Synthesis and Electrochemical Performance of Spinel-type High-entropy Oxides [J]. Chem. J. Chinese Universities, 2020, 41(8): 1801.
[9]	LU Di,ZHENG Chunman,CHEN Yufang,LI Yujie,ZHANG Hongmei. Synthesis of Li-rich Layers/Spinel/Carbon Composite Cathode Materials with Phenol Formaldehyde Resin and Its Electrochemical Performance^† [J]. Chem. J. Chinese Universities, 2020, 41(7): 1684.
[10]	LIU Yabing,LI Mingyang,TIAN Ge,ALATENG Shaga,PEI Tonghe,NIE Jingsi. Syntheses, Structures and Catalytic Properties of Two Supramolecular Complexes Based on 2-Pyridylamine and Cluster ^† [J]. Chem. J. Chinese Universities, 2020, 41(5): 995.
[11]	ZHUO Mengning,LI Fei,JIANG Hao,CHEN Qianwen,LI Peng,WANG Lizhang. Preparation of SnO₂/GDE Cathodes and Their Electrocatalytic Reduction of CO₂ to Produce Formic Acid ^† [J]. Chem. J. Chinese Universities, 2020, 41(3): 530.
[12]	DONG Le, HUANG Xingliang, REN Junjie, DAI Xiaoping, LIU Zongyan, TIAN Hongfeng, WANG Zhidong, WU Xiaotong. Influence Mechanism of Particle Size and Distribution of Silica Sol in the Synthesis of Ferrierite Zeolite with High SiO₂/Al₂O₃ Ratio [J]. Chem. J. Chinese Universities, 2020, 41(11): 2449.
[13]	ZHOU Hai, CHEN Hao, GUO Ya, KANG Min. Synthesis of Meso-porous Co₃O₄ Polyhedra and Their Electrochemical Properties^† [J]. Chem. J. Chinese Universities, 2019, 40(7): 1374.
[14]	GAO Ningxiao,XU Yulong,LIU Yong. Preparation of Carbon Dots from Soy Milk Powder and Fluorescent Nanofibers Containing Carbon Dots^† [J]. Chem. J. Chinese Universities, 2019, 40(3): 555.
[15]	Yuzhen DUAN,Jinyu ZHU,Junming GUO,Mingwu XIANG,Xiaofang LIU,Hongli BAI,Changwei SU. Synthesis and Electrochemical Properties of Spinel Lithium Manganese Cathode Material LiNi_0.01Co_0.03Mn_1.96O₄ ^† [J]. Chem. J. Chinese Universities, 2019, 40(12): 2574.

Preparation of Li_xMn₂O₄ Spinels by in-situ Redox Precipitation Hydrothermal Synthesis Process

PDF (PC)

Knowledge

Abstract

Cite this article

share this article

References

Related Articles 15

Recommended Articles

Metrics

Comments