E-resources
Peer reviewed
Open access
-
Xia, Wenchao; Zheng, Zihao; Zhou, Lei; Sun, Jitie; Bei, Fengli
International journal of electrochemical science, 10/2023, Volume: 18, Issue: 10Journal Article
In this study, reduced graphene oxide (RGO) coated Li1.2Mn0.54Co0.13Ni0.13O2 (RGO@LMNCO) materials with different amounts of RGO were synthesized using a facile hydrothermal method. The double electron layer on the graphene surface was opened by adding a certain amount of electrolyte(NaCl)to the solution to increase the activity of the graphene, thus contributing to the uniform dispersion of the nano-cathode material on the RGO and reducing the secondary agglomeration. The physical characterization and electrochemical test results confirmed that LMNCO material with 2 wt% RGO (2 wt%RGO@LMNCO) was most uniformly dispersed on RGO and exhibited the optimal overall electrochemical performance. The above result suggested that this strategy can be more conductive to exerting the superiority of RGO coating. RGO coating enhanced electronic and ionic conductivity while modifying the potential energy surface of LMNCO effectively and suppressing surface oxygen loss. Subsequently, it can be beneficial to avoid side reactions between the cathode material surface and the electrolyte. As a result, the surface stability of cathode materials was increased. The 2 wt%RGO@LMNCO electrode exhibited a maximum capacity of 308.7mAh g−1 at 0.2 C. With the increase of the charge/discharge current rate from 0.2 C to 10 C, it still reached 112.3mAh g−1. After 50 cycles at 0.2 C rate, the discharge capacity was decreased from 287.5 to 284.8 mAh·g−1, thus maintaining a capacity retention of 99.06%. Furthermore, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were performed to analyze the synthesized sample. The main reason for enhanced electrochemical performance is that the RGO-LMNCO synthesized by the novel coating strategy, which can more effectively exert the modulation effect of graphene on the cathode material surface, exhibits better dispersion and uniform coating.
Shelf entry
Permalink
- URL:
Impact factor
Access to the JCR database is permitted only to users from Slovenia. Your current IP address is not on the list of IP addresses with access permission, and authentication with the relevant AAI accout is required.
Year | Impact factor | Edition | Category | Classification | ||||
---|---|---|---|---|---|---|---|---|
JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
Select the library membership card:
If the library membership card is not in the list,
add a new one.
DRS, in which the journal is indexed
Database name | Field | Year |
---|
Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
---|
Source: Personal bibliographies
and: SICRIS
The material is available in full text. If you wish to order the material anyway, click the Continue button.