copper hexacyanoferrate battery electrodes with long cycle life and high power - commercial energy storage systems

Short-
The term "transient", including those associated with wind and solar energy, poses a challenge to the grid.
Fixed energy storage system that can run multiple cycles at high power and high circular
Low Cost Travel energy efficiency is required.
The existing energy storage technology can no longer meet these requirements.
Here we show the crystal nanoparticles hexyanoferrate of copper, which has super
The low strain open frame structure can be used as a battery electrode in a cheap water electrolyte.
After 40,000 deep discharge cycles at a rate of 17 °c, 83% of the original copper-iron acid copper capacity was retained.
Even at a very high cycle rate of 83 °c, 2 out of 3 of its maximum discharge capacity can be observed.
At medium current density, round
99% of energy efficiency can be achieved. The low-
Price, expandable, guest room-temperature co-
The excellent electrode properties of precipitated and synthesized iron, iron, acid and copper make it large-
Scale energy storage system. Co-
The precipitated CuHCF nano-powder was synthesized by adding 120 ml 0 at the same time. 1 M Cu(NO)(Alfa Aesar)
0 120 ml. 05 M KFe(CN)(Sigma Aldrich)
Reached 60 ml HO during constant stirring.
The yellow-brown precipitate formed immediately.
After 20 minutes of ultrasound, the pause was allowed to sit for 6 hours.
Filter the precipitation, wash with water, and vacuum dry at room temperature.
In order to prepare the electrode, 80% wt/wt CuHCF, 9% wt/wt amorphous carbon (
Timcal Super P Li)
, 9% wt/wt polyfluoride (Kynar HSV 900)
, And 2% wt/wt graphite (Timcal KS6)
Ground by hand to produce a uniform black powder.
Contains this mixture and 1-methyl-2-
Apply pyrrosneinone on the carbon cloth (Fuel cell Earth)
A current collector with a mass load of at least 10 mg CuHCF per cm.
The electrodes are dried in air at 100 °c.
Three to the drowning-
Electrode batteries containing 1 m kno per 0.
01 m hno electrolyte (pH=2)
, CuHCF working electrode, Ag/AgCl reference electrode, and reverse electrode containing a large amount of CuHCF or Prussian blue.
The reverse electrode is a reversible absorption cell of potassium.
The same method for the preparation of Prussian blue, except with Fe (NO3)3 and K4Fe(CN)6 precursors (Sigma Aldrich).
The electrode containing CuHCF is first fully discharged by fixing its potential at 0.
4 V to her before the discharge current fades to zero.
The current is then charged on the counter at 1C rate until the desired charging state is reached.
Remove the electrode from the battery and measure its diffraction spectrum.
Use the Treor fitting algorithm in the x'pert high score Plus package to determine the grid parameters for each sample.