In-situ growth flower-like binder-free 3D CuO/Cu2O-CTAB with tunable interlayer spacing for high performance lithium storage |
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Affiliation: | 1. State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi, 830017, Xinjiang, PR China;2. School of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, Hunan, PR China;3. State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, PR China |
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Abstract: | Copper-based oxides are attractive anode materials for lithium-ion batteries (LIBs) due to their abundant resources, low cost, non-toxic and high capacity. However, copper-based oxides will produce a huge volume change during lithiation/delithiation, and the structural strain caused by periodic volume changes may cause the exfoliation of active materials. Herein, a flower-like binder-free three-dimensional (3D) CuO/Cu2O-CTAB was prepared by introducing CTAB, which homogeneously grew in situ on a copper mesh framework. The binder-free 3D sample guarantees direct contact between the active material and the copper mesh, maintaining the structure stability. The flower-like CuO/Cu2O-CTAB with a small size reveals larger active interfaces and provides more active sites. The introduction of CTAB enlarges the interlayer spacing of CuO/Cu2O, increases the active sites for lithium storage, and adapts to the volume change of the material during lithiation/delithiation. In addition, the expanded interlayer structure helps decrease the ion diffusion energy barrier for accelerating electrochemical reaction kinetics. Therefore, CuO/Cu2O-CTAB exhibits better lithium storage performance (2.9 mAh cm?2 at 0.5 mA cm?2) than bare CuO/Cu2O (1.8 mAh cm?2 at 0.5 mA cm?2). |
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Keywords: | Binder-free Interlayer expansion Lithium-ion batteries lithium-ion batteries" },{" #name" :" keyword" ," $" :{" id" :" pc_HLrvBKBnkz" }," $$" :[{" #name" :" text" ," _" :" LIBs Hexadecyl trimethyl ammonium Bromide" },{" #name" :" keyword" ," $" :{" id" :" pc_Hr7isDR9JI" }," $$" :[{" #name" :" text" ," _" :" CTAB three-dimensional" },{" #name" :" keyword" ," $" :{" id" :" pc_WAuhXDJy5w" }," $$" :[{" #name" :" text" ," _" :" 3D polyaniline" },{" #name" :" keyword" ," $" :{" id" :" pc_FQKMpwRdrn" }," $$" :[{" #name" :" text" ," _" :" PANI high resolution transmission electron microscope" },{" #name" :" keyword" ," $" :{" id" :" pc_dm08OVlm8R" }," $$" :[{" #name" :" text" ," _" :" HRTEM X-ray diffraction" },{" #name" :" keyword" ," $" :{" id" :" pc_1WwKOfzOgi" }," $$" :[{" #name" :" text" ," _" :" XRD Cyclic voltammetry" },{" #name" :" keyword" ," $" :{" id" :" pc_cISs5otiR5" }," $$" :[{" #name" :" text" ," _" :" CV X-ray photoelectron spectroscopy" },{" #name" :" keyword" ," $" :{" id" :" pc_ZNHjs63fnV" }," $$" :[{" #name" :" text" ," _" :" XPS solid electrolyte interface" },{" #name" :" keyword" ," $" :{" id" :" pc_3uAQAPFKdg" }," $$" :[{" #name" :" text" ," _" :" SEI scanning electron microscope" },{" #name" :" keyword" ," $" :{" id" :" pc_z4s3ItjZZI" }," $$" :[{" #name" :" text" ," _" :" SEM |
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