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Azo Compounds Derived From Electrochemical Reduction Of Nitro Compounds Are Used In High Performance Lithium Ion Batteries

- Dec 07, 2018 -

Recently, chunsheng wang (corresponding author) and his team at the university of Maryland designed a new chemical based on the electrochemical conversion of nitro compounds into azo compounds for high-performance lithium-ion batteries. 4- lithium nitrate benzoate (NBALS) was selected as the model nitro compound. NBALS at 0. At 5C, the initial capacity was 153mAh g-1,100 cycles to maintain the capacity of 131mAh g-1. The detailed characterization showed that in the initial electrochemical lithification process, the nitro group in the crystalline NBALS was irreversibly reduced to amorphous azo compounds. Subsequently, azo compounds can be reversibly lithium/delithium in the charging/discharging cycle with high electrochemical properties. The lithification/delithification mechanism of azo compounds is also verified by the direct use of azo compounds as electrode materials. The electrode materials exhibit electrochemical properties similar to those of nitrogroup compounds and have higher initial coulomb efficiency. The results were published in Adv as Azo Compounds Derived from Electrochemical Reduction of Nitro Compounds for High Performance Li‐Ion Batteries. Mater. On.

1

How organic molecules work in lithium-ion batteries

In the n-n reaction, two nitro groups are reduced by lithium ions to azo groups to form Li2O.


2

NBALS electrochemical properties in lithium ion batteries

A) constant current charging/discharging curve

B) 0. 1 mV, s minus 1 cyclic voltammetry

C) at 0. The relationship between the lithium removal capacity and coulomb efficiency of 5C under current density and the number of cycles

D) multiplier performance

3

spectral analysis

A) Raman spectra of NBALS electrodes before and after 1 cycle

B) mass spectra of NBALS electrodes before and after 1 cycle

C) XRD spectrum of NBALS electrode before and after 1 cycle

D) diagram and calculation of reduction from NBALS to azo compounds