Creat membership Creat membership
Sign in

Forgot password?

Confirm
  • Forgot password?
    Sign Up
  • Confirm
    Sign In
Creat membership Creat membership
Sign in

Forgot password?

Confirm
  • Forgot password?
    Sign Up
  • Confirm
    Sign In
Collection
For ¥0.57 per day, unlimited downloads CREATE MEMBERSHIP Download

toTop

If you have any feedback, Please follow the official account to submit feedback.

Turn on your phone and scan

home > search >

Bismuth oxide coated amorphous manganese dioxide for electrochemical capacitors

Author:
Li, Xiaofeng   Zhang, Linsen   Dong, Huichao   Xia, Tongchi   Huang, Zhigang  


Journal:
Solid State Sciences


Issue Date:
2015


Abstract(summary):

With MnSO4, NaOH and K2S2O8 as the raw materials, the amorphous and delta-type manganese dioxide (MnO2) is separately prepared by using different chemical precipitation-oxidation methods. The results of charge-discharge and electrochemical impedance spectroscopy (EIS) tests show that (i) the specific capacitance of the amorphous MnO2 reaches to 301.2 F g(-1) at a current density of 200 mA g-1 and its capacitance retention rate after 2000 cycles is 97%, which is obviously higher than 250.8 F g(-1) and 71% of the delta-type one, respectively; (ii) good electrochemical capacitance properties of the amorphous MnO2 should be contributed to easy insertion/extraction of ions within the material; (iii) when 5 wt% Bi2O3 is coated on the amorphous MnO2, its specific capacitance increases to 352.8 F g(-1) and the capacitance retention rate is 90% after 2000 cycles. (C) 2015 Elsevier Masson SAS. All rights reserved.


Page:
46-52


VIEW PDF

The preview is over

If you wish to continue, please create your membership or download this.

Create Membership

Similar Literature

Submit Feedback

This function is a member function, members do not limit the number of downloads