I have prepared metal oxide-rGO composites with different rGO ratios. ex. 5%, 10% and 20%. Metal oxide with 10 % rGO has shown superior electrochemical performance for lithium ion batteries compared to other compositions. How to justify the results
Generally, rGO possesses better electrical conductivity than metal oxides, which is beneficial to the fast electron transport and charge transfer. However, the reversible capacity of rGO is lower than those of some metal oxides. Moreover, the large surface area of rGO results in a low coulombic efficiency , leading to a relatively poor cycling performance. To obtain a good lithium-ion storage performance, the moderate amount of rGO is necessary.
Dear Jin Niu sir,
Thank you so much sir. Its very informative.
Will there be an increase in surface area (BET) with increase in rGO composition irrespective of their performance? Will the surface area be in this order 20% > 10% > 5% ?
hello Shivaraj Patil
You have to find the optimum proportion for the composite for which maximum electrochemical behavior will be obtained. Such proportion supplies maximum surface area and electrochemical cavities for electrolyte ions to interact. So, maximum electrochemical reactions occur throughout the electrode surface for the specified proportion rather than the other synthesized composite regarding different proportions of rGO.
There are several articles discussing about the same aspect. For an example, plz go through the paper attached below. You have an idea about the whole.
Dear Bidhan Pandith
Thank you. It is very helpful. And thanks for the paper.
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