Data on unstable charge/discharge behavior of composite anode composed of Sn compound and multi-walled carbon nanotube

This data is related to the article entitled “Effect of Composite Structure on Capacity Instability of SnO2-Coated Multiwalled Carbon Nanotube Composite Anode” (Kim et al., 2018) [1]. This data provides the information about capacitance instability of a composite anode material based on multiwalled carbon nanotube (MWCNT) coated with crystalline and amorphous SnO2 and Sn on the inner and outer walls of MWCNT fabricated by a simple wet synthesis method.


a b s t r a c t
This data is related to the article entitled "Effect of Composite Structure on Capacity Instability of SnO 2 -Coated Multiwalled Carbon Nanotube Composite Anode" (Kim et al., 2018) [1]. This data provides the information about capacitance instability of a composite anode material based on multiwalled carbon nanotube (MWCNT) coated with crystalline and amorphous SnO 2 and Sn on the inner and outer walls of MWCNT fabricated by a simple wet synthesis method.
& 2018 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

Subject area
Materials More specific subject area

Composite Anode
Type of data

Value of the data
Coin cell data on MWCNT-Sn compound composite anode. Data on instability of charge / discharge characteristics when Sn compound exists outside MWCNT Data on the optimum structure of anode composite composed of Sn compound and MWCNT.

Data
This dataset provides information on the capacitance instability of MWCNT-Sn compound composite anode and the capacity variation characteristics of the composite with the progress of chargedischarge when the Sn compound is predominantly located on the outer surface of the MWCNT. Fig. 1 shows the TEM image of MWCNT-Sn based composite. Fig. 2 gives the graph for capacities vs. cycle number for MWCNT-Sn based composite anode materials obtained using the 2032 coin cell with metal Li. Table 1 shows representative values of the specific capacity according to the cycle number of the MWCNT-Sn compound composite anode synthesized at a precursor concentration of 0.5 M.

Experimental design, materials and methods
In order to chemically activate the surface of the MWCNT having an average diameter of 500 nm, a chemical surface treatment was carried out by the liquid phase method as follows. 1 g of MWCNT was stirred in 1 mol of nitric acid solution at 120°C for 4 h and then washed with distilled water until pH 7. The resulting reaction product was then dried at 60°C for 24 h. 0.105 g of SnC 2 O 4 ·2H 2 O was mixed with 3 ml of distilled water and stirred at room temperature for 60 min. 3 ml of ethylene glycol and 0.25 g of poly-vinylpyrrolidone (PVP) were stirred at room temperature for 10 minutes. 0.33 g of the surface-treated MWCNT and thus obtained solution were mixed and heated to 195°C and then stirred for another 5 h. The obtained reaction product was centrifuged, washed with distilled water and centrifuged again to obtain a precipitate. The precipitate was again dried in an electric oven at 50°C for 5 h to obtain a composite anode in the form of a black powder.
A high resolution TEM analysis was performed to identify the shape and location of the hybridized Sn compounds in the MWCNT composite anode. An anode electrode slurry composed of 86 wt% of active material, 9 wt% of conductive material, and 5 wt% of binder was directly applied on the aluminum current collector to have a thickness of 50 μm and dried at 80°C for 4 h. A CR2032 coin cell was prepared in a glove box using Li metal as the counter electrode and 1 M LiPF 6 (EC: DMC: EMC ¼1: 1: 1) as the electrolyte. Specific capacities were measured using a cycling voltage and current method (CV) at a scan rate of 0.1 mV/s in the potential range of 0.1 and 2.5 V at room temperature (298 K).

Transparency document. Supplementary material
Supplementary data associated with this article can be found in the online version at http://dx.doi. org/10.1016/j.dib.2018.02.023.