铝钴共掺杂锂锰氧化物的制备及吸附提锂性能

doi:10.19964/j.issn.1006-4990.2022-0616

Abstract

Abstract:

Al-Co co-doped lithium ion sieves precursors Li_1.6（Mn_1-_x Al _x ）_1.6Co _y O₄ was synthesized by hydrothermal process using electrolytic manganese dioxide and lithium chloride as raw materials，doped with a small amount of aluminum chloride and cobalt chloride.The crystal phase，morphology，element distribution and lithium adsorption performance of Al-Co co-doped lithium ion sieves were studied by XRD，SEM，TEM and Li⁺ adsorption and desorption property test.The results showed that Al-Co co-doped lithium ion sieve had spinel structure.A nanosheet polyhedral morphology and a uniform element distribution was obtained for the specimen.When the initial concentration for Li⁺ solution was 100 mg/L，the Li⁺ equilibrium adsorption capacity for H_1.6（Mn_0.9Al_0.1）_1.6Co_0.05O₄ was 38.53 mg/L and the Li⁺ adsorption performance was significantly improved.After 5 cycles of adsorption and desorption experiments，the Li⁺adsorption capacity could be maintained at 92% of the initial adsorption capacity.Therefore，due to the synergistic effect of the two elements，Al-Co co-doping could make lithium ion sieves obtain excellent adsorption performance and cycling stability.

Key words: lithium ion sieve, Al-Co co-doped, Li⁺ adsorption capacity, cycling stability

CLC Number:

TQ131.11

HAN Hongjing, ZHANG Jingze, LAMAO Zhuoma, HAN Jizhe, WU Yongmin, TANG Weiping. Preparation of Al-Co co-doped lithium manganese oxide and its adsorption performance of lithium[J]. Inorganic Chemicals Industry, 2023, 55(7): 38-44.

Figures/Tables 9

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样品	Langmuir			Freundlich
样品	q_m / （mg·g^-1）	b/ （L·mg^-1）	R²	k_F/ （mg^1-1/ⁿ · L^1/ⁿ ·g^-1）	n	R²
Al-0.3-Co-0.05	44.07	0.119 6	0.996 8	19.234 6	5.821 7	0.931 4
Al-0.2-Co-0.05	46.15	0.114 4	0.999 0	18.455 5	5.174 6	0.946 7
Al-0.1-Co-0.05	48.24	0.108 6	0.998 8	18.345 1	4.896 2	0.960 6
Al-0.1-Co-0.1	52.94	0.034 2	0.929 1	6.959 9	2.498 4	0.805 2
Al-0.1-Co-0.15	46.19	0.038 6	0.977 7	7.542 7	2.814 4	0.883 3

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Preparation of Al-Co co-doped lithium manganese oxide and its adsorption performance of lithium

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