Preparation Of Electrode Based On Sodium Alcohol Material And Its Sodium Storage Performance

Organic electrode material is a kind of green electrode material with rich designability,environmental friendliness and sustainability.Organic sodium ion electrode materials generally contain energy storage functional groups and conjugated aromatic structures.However,the types of functional groups of organic sodium ion electrode materials are not rich,which limit the development of this organic electrode material.In this thesis,a new type of organic energy storage material organic alkoxide is proposed.Its main feature is that its active molecules cannot contain conjugated aromatic structure.Therefore,it brings a new direction for the design of organic sodium ion electrode materials.Firstly,the organic alkoxide electrode materials were analyzed and verified by taking sodium tert butoxide as an example.In electrochemical experiments,the charge discharge curve of sodium tert butoxide electrode material has an obvious working platform,and its cyclic voltammetry(CV)curve has an obvious redox peak.When sodium tert butoxide was used as the positive material of rechargeable battery,the voltage of sodium ion battery was 2.4 V.The organic electrode material of sodium tert butoxide was used for 5000 cycles(210 mAg-1)at the capacity of 124 mAhg-1,and no obvious capacity attenuation was found.In this thesis,the electrochemical mechanism of sodium tert butoxide electrode materials was analyzed by FTIR,1H NMR and SEM.The binding energy of sodium tert butoxide electrode material was analyzed by DFT calculation.Secondly,the performance of organic alkoxide electrode materials was analyzed by taking sodium t-amylate as an example.In electrochemical experiments,the charge discharge curve of sodium t-amylate electrode material has an obvious working platform,and its cyclic voltammetry(CV)curve has an obvious redox peak.When sodium t-amylate was used as the positive material of rechargeable battery,the voltage of sodium ion battery was 2.5 V.The organic electrode material of sodium t-amylate was used for 3000 cycles(220 mAg-1)at the capacity of 111 mAhg-1,and no obvious capacity attenuation was found.The electrochemical mechanism of sodium t-amylate electrode materials was analyzed by FTIR,1H NMR and SEM.The binding energy of sodium t-amylate electrode material was analyzed by DFT calculation.At last,a primary battery with both negative and positive materials of organic materials was designed.When sodium tert butoxide and sodium t-amylate were used as the negative materials of the primary battery,the voltage of the organic primary battery was 1.1 V and the discharge capacity could reach 88 mAhg-1.The electrochemical mechanism of organic primary battery was analyzed by FTIR,1H NMR and SEM.It is proved that organic alkoxide is an organic electrode material with good performance,which opens a new way for the design of organic electrode materials.