scholarly journals Electrochemical Mechanism of Recovery of Nickel Metal from Waste Lithium Ion Batteries by Molten Salt Electrolysis

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6875
Author(s):  
Hui Li ◽  
Yutian Fu ◽  
Jinglong Liang ◽  
Chenxiao Li ◽  
Jing Wang ◽  
...  
Keyword(s):  
Molten Salt ◽  
Lithium Ion Batteries ◽  
Electrochemical Reduction ◽  
Reduction Process ◽  
Lithium Ion ◽  
Open Circuit ◽  
Nickel Metal ◽  
Molten Salt Electrolysis ◽  
Reduction Behavior ◽  
Valuable Metals

With the widespread use of lithium-ion batteries, the cumulative amount of used lithium-ion batteries is also increasing year by year. Since waste lithium-ion batteries contain a large amount of valuable metals, the recovery of valuable metals has become one of the current research hotspots. The research uses electrometallurgical technology, and the main methods used are cyclic voltammetry, square wave voltammetry, chronoamperometry and open circuit potential. The electrochemical reduction behavior of Ni3+ in NaCl-CaCl2 molten salt was studied, and the electrochemical reduction behavior was further verified by using a Mo cavity electrode. It is determined that the reduction process of Ni3+ in LiNiO2 is mainly divided into two steps: LiNiO2 → NiO → Ni. Through the analysis of electrolysis products under different conditions, when the current value of LiNiO2 is not less than 0.03 A, the electrolysis product after 10 h is metallic Ni. When the current reaches 0.07 A, the current efficiency is 77.9%, while the Li+ in LiNiO2 is enriched in NaCl-CaCl2 molten salt. The method realizes the separation and extraction of the valuable metal Ni in the waste lithium-ion battery.

Electrochemical recovery of Ni metallic in molten salts from spent lithium-ion battery

2020 ◽  
Vol 18 (8) ◽  
Author(s):  
Jinglong Liang ◽  
Jing Wang ◽  
Hui Li ◽  
Chenxiao Li ◽  
Hongyan Yan ◽  
...  
Keyword(s):  
Molten Salt ◽  
Lithium Ion Battery ◽  
Electrochemical Reduction ◽  
Lithium Ion ◽  
Cell Voltage ◽  
Metallic Nickel ◽  
Molten Salt Electrolysis ◽  
Reduction Behavior ◽  
Urgent Task ◽  
Constant Cell

AbstractMassive deployment of lithium-ion battery inevitably causes a large amount of solid waste. To be sustainably implemented, technologies capable of reducing environmental impacts and recovering resources from spent lithium-ion battery have been an urgent task. The electrochemical reduction of LiNiO2 to metallic nickel has been reported, which is a typical cathode material of lithium-ion battery. In this paper, the electrochemical reduction behavior of LiNiO2 is studied at 750 °C in the eutectic NaCl-CaCl2 molten salt, and the constant cell voltage electrolysis of LiNiO2 is carried out. The results show that Ni(III) is reduced to metallic nickel by a two-step process, Ni(III) → Ni(II) → Ni, which is quasi-reversible controlled by diffusion and electron transfer. After electrolysis for 6 h at 1.4 V, the surface of LiNiO2 cathode is reduced to metallic nickel, with NiO and a small amount of Li0.4Ni1.6O2 detected inside the partially reduced cathode. After prolonging the electrolysis time to 12 h, LiNiO2 is fully electroreduced to metallic nickel, achieving a high current efficiency of 98.60%. The present work highlights that molten salt electrolysis could be an effective protocol for reclamation of spent lithium-ion battery.

Three-dimensionally interconnected Si frameworks derived from natural halloysite clay: a high-capacity anode material for lithium-ion batteries

2018 ◽  
Vol 47 (22) ◽  
pp. 7522-7527 ◽  
Author(s):  
Hao Wan ◽  
Hao Xiong ◽  
Xiaohe Liu ◽  
Gen Chen ◽  
Ning Zhang ◽  
...  
Keyword(s):  
Molten Salt ◽  
Lithium Ion Batteries ◽  
Anode Material ◽  
High Capacity ◽  
Reduction Process ◽  
Lithium Ion ◽  
Salt Reduction ◽  
Branch Diameter

Three-dimensionally interconnected (3D-interconnected) Si frameworks with a branch diameter of ∼15 nm were successfully prepared using a molten-salt reduction process.

In-situ growth of silicon nanowires on graphite by molten salt electrolysis for high performance lithium-ion batteries

2020 ◽  
Vol 273 ◽  
pp. 127946 ◽  
Author(s):  
Zhanglong Yu ◽  
Sheng Fang ◽  
Ning Wang ◽  
Bimeng Shi ◽  
Yicheng Hu ◽  
...  
Keyword(s):  
Molten Salt ◽  
Lithium Ion Batteries ◽  
Silicon Nanowires ◽  
High Performance ◽  
Lithium Ion ◽  
In Situ Growth ◽  
Molten Salt Electrolysis

ELECTROCHEMICAL PROPERTY OF LiMn2O4 IN OVER-DISCHARGED CONDITIONS

2012 ◽  
Vol 05 (03) ◽  
pp. 1250028 ◽  
Author(s):  
JINKUI FENG ◽  
BOHANG SONG ◽  
MAN ON LAI ◽  
LI LU ◽  
XIANTING ZENG ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Electrochemical Reduction ◽  
Anode Material ◽  
Electrochemical Property ◽  
High Capacity ◽  
Reduction Process ◽  
Lithium Ion ◽  
Electrochemical Measurement ◽  
Charge Capacity ◽  
Initial Charge

This work studies LiMn 2 O 4 in an over-discharged condition. Electrochemical measurement shows that the LiMn 2 O 4 electrode undergoes an irreversible electrochemical reduction process where its structure is permanently destroyed during over-discharge. Although LiMn 2 O 4 shows a poor over-discharge durance with a reduction starting at 2.5 V vs. Li/Li+ , the galvanostatic test indicates that LiMn 2 O 4 can be considered to be used as a high capacity anode material for lithium ion batteries with an initial charge capacity of 814 mAh ⋅ g-1 and 452 mAh ⋅ g-1 at the 100th cycle.

scholarly journals Synergistic Recovery of Valuable Metals from Spent Nickel–Metal Hydride Batteries and Lithium-Ion Batteries

2019 ◽  
Vol 7 (19) ◽  
pp. 16103-16111 ◽  
Author(s):  
Fupeng Liu ◽  
Chao Peng ◽  
Antti Porvali ◽  
Zulin Wang ◽  
Benjamin P. Wilson ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Metal Hydride ◽  
Lithium Ion ◽  
Nickel Metal ◽  
Nickel Metal Hydride ◽  
Valuable Metals
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