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基于硫酸钠溶液电解的废旧镍氢电池全金属回收
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作者 方加虎 何雨林 +5 位作者 诸葛祥群 罗志虹 罗鲲 丁正平 刘晓腾 李义兵 《Transactions of Nonferrous Metals Society of China》 SCIE EI CSCD 2023年第12期3860-3870,共11页
提出废旧镍氢(Ni-MH)电池全金属可持续回收的方法,分别用硫酸钠溶液电解获得的H_(2)SO_(4)和NaOH溶液作为浸出剂和沉淀试剂。电极材料在温和条件下浸出,超过99%的稀土元素在pH1.0时以双硫酸盐的形式从溶液中沉淀,进而通过与NaOH反应转... 提出废旧镍氢(Ni-MH)电池全金属可持续回收的方法,分别用硫酸钠溶液电解获得的H_(2)SO_(4)和NaOH溶液作为浸出剂和沉淀试剂。电极材料在温和条件下浸出,超过99%的稀土元素在pH1.0时以双硫酸盐的形式从溶液中沉淀,进而通过与NaOH反应转化为氢氧化物。在后续浸出液的纯化过程中,Al^(3+)和Fe^(3+)在pH 5.5时沉积,Zn^(2+)和Mn^(2+)用皂化D2EHPA-煤油从浸出液中萃取出来,形成两种具有工业价值的氢氧化物副产品。Ni^(2+)和Co^(2+)在pH9.5时沉淀,总回收率为97.5%。Na_(2)SO_(4)的总回收率达97%。这种金属回收方法可带来明显的经济效益,且闭环处理过程中无固体或液体废弃物。 展开更多
关键词 废旧镍氢电池 金属回收 电解 硫酸钠 闭环过程
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Multi-core-shell-structured LiFePO_(4)@Na_(3)V_(2)(PO_(4))_(3)@C composite for enhanced low-temperature performance of lithium-ion batteries 被引量:6
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作者 Xing-Xing Gu Shuang Qiao +4 位作者 Xiao-Lei Ren Xing-Yan liu You-Zhou He xiao-teng liu Tie-Feng liu 《Rare Metals》 SCIE EI CAS CSCD 2021年第4期828-836,共9页
In this work,a multi-core-shell-structured LiFePO_(4)@Na_(3) V_(2)(PO_(4))_(3)@C(LFP@NVP@C) composite was successfully designed and prepared to address inferior low-temperature performance of LiFePO_(4) cathode for li... In this work,a multi-core-shell-structured LiFePO_(4)@Na_(3) V_(2)(PO_(4))_(3)@C(LFP@NVP@C) composite was successfully designed and prepared to address inferior low-temperature performance of LiFePO_(4) cathode for lithium-ion batteries.Transmission electron microscopy(TEM) confirms the inner NVP and outer carbon layers coexisted on the surface of LFP particle.When evaluated at low-temperature operation,LFP@NVP@C composite exhibits an evidently enhanced electrochemical performance in term of higher capacity and lower polarization,compared with LFP@C.Even at-10℃ with 0.5 C,LFP@NVP@C delivers a discharge capacity of ca.96.9 mAh-g^(-1) and discharge voltage of ca.3.3 V,which is attributed to the beneficial contribution of NVP coating.NAS ICON-structured NVP with an open framework for readily insertion/desertion of Li+ will effectively reduce the polarization for the electrochemical reactions of the designed LFP@NVP@C composite. 展开更多
关键词 LiFePO_(4)@Na_(3)V_(2)(PO_(4))_(3)@C composite Multi-core-shell Low-temperature Lithium-ion batteries
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Effect of Al_4C_3 Particle Size Distribution in a Al–2.5C Master Alloy on the Refining Efficiency of the AZ31 Alloy
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作者 Yu-Zhen Zhao xiao-teng liu Hai Hao 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2017年第6期505-512,共8页
The Al-2.5C master alloy is prepared to investigate the effect of the Al4C3 particle size distribution on the refining efficiency of the AZ31 alloy. The results indicate that the Al4C3 particles are potent nucleation ... The Al-2.5C master alloy is prepared to investigate the effect of the Al4C3 particle size distribution on the refining efficiency of the AZ31 alloy. The results indicate that the Al4C3 particles are potent nucleation substrates for primary α-Mg grains. With 1.0 wt% master alloy addition, the grain size is reduced from 204 to 70 μm. The grain refining efficiency of the Al4C3 particles on the AZ31 alloy is calculated to be 0.04%-0.75%. Such low refining efficiency is mainly attributed to the size distribution of the Al4C3 particles. The particle sizes are in the range from 0.18 to 7.08 μm, and their distribution is well fitted by a log-normal function. The optimum particle size range for significant grain refinement is proposed to be around 5.0-7.08 μm in the present conditions. 展开更多
关键词 Particle size distribution Grain refining efficiency Al-2.5C master alloy Magnesium alloys
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