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Abstract Sulfides are promising anode candidates because of their relatively large theoretical discharge/charge specific capacity and pretty small volume changes, but suffers from sluggish kinetics and structural instability upon cycling. Phase engineering can be designed to overcome the weakness of the electrochemical performance of sulfide anodes. By choosing nickel sulfides (α-NiS, β-NiS, and NiS ) supported by reduced graphene oxide (rGO) as model systems, it is demonstrated that the nickel sulfides with different crystal structures show different performances in both sodium-ion and pot...

Stuff a combination of bravery and maci small that drove them to take on dangerous missions with aircraft that were still in the development stage. armstrong's interest in aircraft dates back to his early childhood he and his father once took a ride in a ford tri motor known as the tin goose they also attended local air shows together . armstrong knew from the very start that he wanted to be a pilot later he worked various jobs to earn money for flying lessons and earned a student flight certificate on the day he turned 16. he also made his 1st solo flight later that month. in 1947 armstrong e...

A federal program in return after graduation he was required to complete 3 years of training and service in the u.s. navy. afterward armstrong returned to purdue earning a degree in aeronautical engineering in january 1055. years later armstrong married janet sharon whom he met at purdue. he wasn't yet thinking about space travel he was now starting a career as a test pilot. in october 957 the soviet union shocked the world by launching the 1st satellite called sputnik. at that time many in the west believe that the u.s.s.r. was technologically backward but the launch of sputnik changed all of...