英语翻译

英语翻译
不要翻译软件的
2.1.Sol–gel (SG) method
Li1.05Ni1/3Co1/3Mn1/3O2 cathode material was synthesized by the citric acid sol–gel method [31] in following manner.Stoichiometric amounts of Li(CH3COO)•2H2O,Mn(CH3COO)2•4H2O,Ni(CH3COO)2•4H2O,and Co(CH3COO)2•4H2Owere dissolved in distilled water.Citric acid was used as a chelating agent.The solution pH was adjusted to 7.0 with ammonium hydroxide.The solution was heated at 70–80 ◦C until a transparent sol was obtained.The
resulting gel precursor was dried at 120 ◦C for 4 h in air and followed with decomposition at 450 ◦C for 8 h to remove the organic contents.The decomposed powders were ground by ball milling (Spex 8000 Mixer/Mill) with stainless steel balls for 2 h and sintered at 850 ◦C in air for 12 h.The heating and cooling rates of the
powder were 4 ◦C and 2 ◦Cmin−1,respectively.
2.2.Co-precipitation (CP) method Li1.05Ni1/3Co1/3Mn1/3O2 cathode material was synthesized by co-precipitation method from Ni–Co–Mnmixed hydroxide precursor [17,24].The precursor (Ni1/3Co1/3Mn1/3)(OH)2 was prepared
by dissolving stoichiometric amounts of Ni(CH3COO)2•4H2O,Co(CH3COO)2•4H2O and Mn(CH3COO)2•4H2O in distilled water (cationic ratio of Ni:Co:Mn = 1:1:1) and the concentration of the total metal acetate was 2mol L−1.The aqueous solution was precipitated by adding LiOH (1 M)/NH4OH (3M) along with continued stirring.The solution was maintained at 50 ◦C for 24 h and the pH was controlled to 10–11.A green brown mixed hydroxide was precipitated.
After filtering and washing,the hydroxide precipitatewas dried at 120 ◦C for 24 h to remove the adsorbed water.Then,the obtained precursor was mixed with required amount of LiOH using a ball mill (Spex 8000 Mixer/Mill) and the powder was pressed into pellets.The pellets were initially heated to 400 ◦C for 6 h in air and then reground.Pellets were remade and subsequently sintered at 900 ◦C for 12 h in air in amuffle furnace.Heating up speed was fixed to 4 ◦Cmin−1 and cooling down speed was fixed to 2 ◦Cmin−1