• Bulletin of the Korean Chemical Society
• /
• v.23 no.12
• /
• pp.1697-1698
• /
• 2002

• Bulletin of the Korean Chemical Society
• /
• v.24 no.1
• /
• pp.9-10
• /
• 2003

• Bulletin of the Korean Chemical Society
• /
• v.13 no.3
• /
• pp.338-339
• /
• 1992

• Journal of Electrochemical Science and Technology
• /
• v.11 no.4
• /
• pp.399-405
• /
• 2020

Hollow copper oxide/multi-walled carbon nanotubes (CuO/MWCNT) composites were fabricated via an optimized infiltration-reduction-oxidation method, which is more facile and easy to control. The crystalline structure and morphology were characterized by X-ray diffraction (XRD), and transmission electron microscopy (TEM). The as-prepared CuO/MWCNT composites deliver an initial capacity of 612.3 mAh·g^-1 and with 80% capacity retention (488.2 mAh·g^-1) after 100 cycles at a current rate of 0.2 A·g^-1. The enhanced electrochemical performance is ascribed to the better electrical conductivity of MWCNT, the hollow structure of CuO particles, and the flexible structure of the CuO/MWCNT composites.

• Resources Recycling
• /
• v.31 no.4
• /
• pp.26-33
• /
• 2022

Owing to the demand for lithium-ion batteries, the recovery of valuable metals from waste lithium-ion batteries is required in future. A pyrometallurgical treatment is appropriate for recycling a large number of waste lithium-ion batteries, but Li loss to slag and dust present a significant challenge. This research investigated carbonation roasting and water leaching behaviors in Li-ion batteries by graphite addition to recover Li from the NCM-based cathode materials of waste Li-ion batteries. When 10 wt% of graphite was added, CO and CO₂ gases were emitted with a rapid weight reduction at apporoximately 850 K, when heated in Ar and CO₂ atmosphere. After the rapid weight reduction, NCM was decomposed and reduced to metal oxides and pure metals. In the carbonation roasting of black powder (NCM+graphite), O₂ is generated via the decomposition of NCM, and an oxides, such as Li₂O and NiO were were also generated. Subsequently, Li₂O reacts with CO₂ to generate Li₂CO₃, and a part of NiO was reduced by graphite to produce metal Ni. In addition, up to 94.5 % Li₂CO₃ with ~99.95 % purity was recovered via water leaching after carbonation roasting.

• Journal of the Korean Electrochemical Society
• /
• v.22 no.2
• /
• pp.69-78
• /
• 2019

Lithium metal anode with the highest theoretical capacity to replace graphite anodes are being reviewed. However, the dendrite growth during repeated oxidation/reduction reaction on lithium metal surface, which results in poor cycle performance and safety issue has hindered its successful implementation. In our previous work, we solved this problem by using surface modification technique whereby a surface pattern on lithium metal anode is introduced. Although the micro-patterned Lithium metal electrode is beneficial to control Li metal deposition efficiently, it is difficult to control the mossy-like Li granulation at high current density ($>2.0mA\;cm^{-2}$). In this study, we introduce vinylene carbonate (VC) electrolyte additive on micro patterned lithium metal anode to suppress the lithium dendrite growth. Owing to the synergetic effect of micro-patterned lithium metal anode and VC electrolyte additive, lithium dendrite at a high current density is dense. As a result, we confirmed that the cycle performance was further improved about 6 times as compared with the reference electrode.

• Bulletin of the Korean Chemical Society
• /
• v.24 no.12
• /
• pp.1845-1848
• /
• 2003

• Bulletin of the Korean Chemical Society
• /
• v.8 no.1
• /
• pp.55-56
• /
• 1987

• Bulletin of the Korean Chemical Society
• /
• v.13 no.6
• /
• pp.702-704
• /
• 1992

• Proceedings of the Korean Radioactive Waste Society Conference
• /
• 2019.05a
• /
• pp.63-64
• /
• 2019