Synthesis of One‐Dimensional Copper Sulfide Nanorods as High‐Performance Anode in Lithium Ion Batteries

Abstract

Nanorod-like CuS and Cu2 S have been fabricated by a hydrothermal approach without using any surfactant and template. The electrochemical behavior of CuS and Cu2 S nanorod anodes for lithium-ion batteries reveal that they exhibit stable lithium-ion insertion/extraction reversibility and outstanding rate capability. Both of the electrodes exhibit excellent capacity retentions irrespective of the rate used, even at a high current density of 3200 mA g(-1) . More than 370 mAh g(-1) can be retained for the CuS electrode and 260 mAh g(-1) for the Cu2 S electrode at the high current rate. After 100 cycles at 100 mA g(-1) , the obtained CuS and Cu2 S electrodes show discharge capacities of 472 and 313 mAh g(-1) with retentions of 92% and 96%, respectively. Together with the simplicity of fabrication and good electrochemical properties, CuS and Cu2 S nanorods are promising anode materials for practical use the next-generation lithium-ion batteries.

Ether based electrolyte improves the performance of CuFeS2 spike-like nanorods as a novel anode for lithium storage

“…4 with the electrochemical reaction of residue CuS [26] , which is in good accordance with the XRD result discussed above. The peaks at 1.73 V represents the formation of intermediates, Li x CuFeS 2 [27] .…”

“…During the discharge process of the initial cycle, both curves show four voltage plateaus at 2.05 V, 1.76 V, 1.65 V and 1.51 V. There are three voltage plateaus at 1.78 V, 2.32 V and 2.45 V in the charge process of the 1 st cycle. As mentioned above, the plateaus at 2.05 V and 1.65 V of the initial discharge process correspond to the reduction of CuS [26] .…”

l-Cysteine-assisted hydrothermal synthesis of nickel disulfide/graphene composite with enhanced electrochemical performance for reversible lithium storage

“…It's necessary to devote some efforts to study alternative anode materials with higher specific capacity, desirable rate capability and long cycle life to meet the ever-increasing performance demands. Transition metal sulfides such as copper sulfides [2,3], ferric sulfides [4,5], cobalt sulfides [6e8] and nickel sulfides [9e13] have been actively investigated as possible candidates for anode materials due to their high capacity, low cost and eco-friendliness. Among the family of transition metal sulfides, nickel sulfides have caused a special attention due to their interesting electronic, magnetic, optical properties [14,15] and their multiple potential applications including LIBs [9e13], supercapacitors [16e18] and catalysts [19,20].…”

New Insight into the Interaction between Carbonate-based Electrolyte and Cuprous Sulfide Electrode Material for Lithium Ion Batteries

“…Among these sulfides, cuprous sulfide (Cu 2 S) has a higher theoretical specific capacity (about 335 mAh g À1 ) with a flat discharge platform and better electronic conductivity (10 4 Scm À1 ) compared with commercialized Li 4 Ti 5 O 12 anode [1,11]. Compared with the commonly-used graphitic carbon anode, Cu 2 S exhibits a flat lithium insertion/extraction voltage platform at approximately 1.70 V (vs. Li/Li + ), which is higher than the operating voltage of graphitic anodes, thus, the formation of SEI layers and lithium dendrites can be effectively reduced [12].…”