Synthesizing method of modified columbic anhydride for lithium ion battery
A technology of niobium pentoxide and lithium ion battery, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as modification research that has not yet been reported, and achieve the effects of improving electrical conductivity, increasing practical ratio, and improving electrical conductivity
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Embodiment 1
[0026] In 0.99L of 1.0mol / L oxyfluoroniobic acid (H 2 Nb 5 ) solution, adding 10ml of AlCl with a concentration of 1mol / L 3 The solution was added dropwise with 25% chemically pure ammonia water at 3 ml / min under a water bath condition of 60° C. and a stirring speed of 500 rpm. When the pH value reaches 9.0, stop adding ammonia water dropwise, control the temperature and continue to stir for 2 hours. After aging for 1 hour, filter and wash until there is no F and Cl. Suction filtration, dehydration with absolute ethanol, drying at 90°C for 1 hour, and calcining at 1000°C for 4 hours. After cooling down, crushing through a 1000-mesh sieve to obtain niobium pentoxide uniformly doped with Al, wherein the ratio of the amount of Al element to the sum of the amounts of Al and Nb is 1 / 100.
[0027] Mix the synthesized Al-doped niobium pentoxide with acetylene black, conductive graphite, and PVDF at a ratio of 94wt.%: 1.5wt.%: 1.5wt.%: 3wt.%, and coat it on the Al foil . The elec...
Embodiment 2
[0029] In 0.98L of 1.0mol / L oxyfluoroniobic acid (H 2 Nb 5 ) solution, adding 20ml of Co with a concentration of 0.5mol / L 2 (SO 4 ) 3 The solution was added dropwise with 25% chemically pure ammonia water at 3 ml / min under the condition of a water bath at 55°C and a stirring speed of 500 rpm. When the pH value reaches 9.2, stop adding ammonia water dropwise, control the temperature and continue stirring for 2 hours, after aging for 1 hour, filter and wash until there is no F and S. Suction filtration, dehydration with absolute ethanol, drying at 90°C for 1 hour, and calcining at 1000°C for 4 hours. After cooling down, crushing through a 1000-mesh sieve to obtain niobium pentoxide uniformly doped with Co, wherein the ratio of the amount of Co element to the sum of the amounts of Co and Nb is 2 / 100.
[0030] Mix the synthesized Co-doped niobium pentoxide with acetylene black, conductive graphite, and PVDF at a ratio of 94wt.%: 1.5wt.%: 1.5wt.%: 3wt.%, and coat it on the Al ...
Embodiment 3
[0032] In 0.98L of 1.0mol / L oxyfluoroniobic acid (H 2 Nb 5 ) solution, adding 10ml of NH with a concentration of 2mol / L 4 VO 3 The solution was added dropwise with 25% chemically pure ammonia water at 3 ml / min under a water bath condition of 60° C. and a stirring speed of 450 rpm. When the pH value reaches 9.2, stop adding ammonia water dropwise, control the temperature and continue stirring for 2 hours, after aging for 1 hour, filter and wash until there is no F. Suction filtration, dehydration with absolute ethanol, drying at 90°C for 1 hour, and calcining at 950°C for 6 hours. After cooling down, crushing through a 1000-mesh sieve to obtain niobium pentoxide uniformly doped with V, wherein the ratio of the amount of V element to the sum of the amounts of V and Nb is 2 / 100.
[0033] Mix the synthesized V-doped niobium pentoxide with acetylene black, conductive graphite, and PVDF at a ratio of 94wt.%: 1.5wt.%: 1.5wt.%: 3wt.%, and coat it on the Al foil . The electrochemic...
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