复旦逆天电池——电动车冲电10秒可行驶400公里

2013年3月13日19:23
中新社上海3月13日电 (记者 邹瑞玥)
（真假自辨，股市已经有反应了）

最新一期《自然》(Nature)杂志子刊《科学报道》(Sci.Report)刊发了复旦大学教授吴宇平课题组的一项重磅研究成果。这项关于水溶液锂电池体系的最新研究，可将锂电池性能提高80%。电动汽车只需充电10秒即可行驶400公里，这种电池成本低廉，安全不易爆炸。

吴宇平课题组13日向记者展示了这种锂电池体系。一片薄薄的金属锂，被特制的复合膜紧密包裹，将其置于pH值呈中性的水溶液中，与锂离子电池中传统的正极材料尖晶石锰酸锂组装，即可制成平均充电电压为4.2V、放电电压为4.0V的新型水锂电，这一成果大大突破了水溶液的理论分解电压1.23V。

据透露，目前普遍采用的是有机电解质动力锂离子电池。在大型的储能系统中，传统锂电池成本高，对生产条件要求高，并且由于有机电解质的物理化学性质，存在较大安全隐患。这也是目前电能汽车这样的新能源产品得不到大规模推广的主要阻碍。

吴宇平课题组的这项成果对发展新型的低成本、易大规模生产、安全环保的蓄电池体系提供了可能。据称，新型的水锂电采用水溶液作为电解质，阻燃性增强，使电池在使用过程中不易发烫发热，安全性能高；用高分子材料和无机材料制成复合膜，能将电池的能量损耗降到5%以下。

据估计，如果将这种电池用于手机，同样大小的电池至少能将手机通话时间延长一倍，成本则不足原有的一半；用于汽车同样如此，对环境构成的污染也比现有锂电池小得多。

吴宇平说，美国能源研究所已“瞄”上这项研究，希望与他达成合作意向。但他更希望能与国内有前瞻性的企业合作。他表示，“新型水锂电在生活中可具体应
用到各方各面，希望水锂电的突破能够
最终使消费者对安全放心、对成本接
受，解决目前全球踌躇不前的电动汽车
产业。”


论文：《使用被覆膜的金属锂作为阳极的水锂电池》：

SCIENTIFIC REPORTS | ARTICLE   

An Aqueous Rechargeable Lithium Battery Using Coated Li Metal as Anode
Xujiong Wang,   Yuyang Hou,   Yusong Zhu,   Yuping Wu   & Rudolf Holze

New energy industry including electric vehicles and large-scale energy storage in smart grids requires energy storage systems of good safety, high reliability, high energy density and low cost. Here a coated Li metal is used as anode for an aqueous rechargeable lithium battery (ARLB) combining LiMn2O4 as cathode and 0.5 mol l1 Li2SO4 aqueous solution as electrolyte. Due to the “cross-over” effect of Li+ ions in the coating, this ARLB delivers an output voltage of about 4.0 V, a big breakthrough of the theoretic stable window of water, 1.229 V. Its cycling is very excellent with Coulomb efficiency of 100% except in the first cycle. Its energy density can be 446 Wh kg1, about 80% higher than that for traditional lithium ion battery. Its power
efficiency can be above 95%. Furthermore, its cost is low and safety is much reliable. It provides another
chemistry for post lithium ion batteries.

链接如下：http://www.nature.com/srep/2013/ ... ep01401.html#/ref19

补充：
Based on the discharge voltages and the capacities of the Li metal anode and LiMn2O4 cathode, the discharge energy density of the ARLB based on the total mass of the electrode materials is 446 Wh kg1, much higher than those for the formerly reported ARLBs (30–45 Wh kg1)14, 15, 16, 17, 18, 19, 20, 21. Of course, it is higher than that for Li/aqueous M+ and the other redox flow batteries3, 4, 5, 9, 12. Based on the manufacturing technologies of lithium ion batteries, half of the energy density can be made practically available7, 14, which means that the practical energy density will be above 220 Wh kg1, about 80% higher than that for the corresponding Li-ion batteries for electric vehicles (120 Wh kg1 for C/organic electrolyte/LiMn2O4)6, 7. This high energy density indicates that a pure electric vehicle can run 200–400 km for one charge.（推测冲一次能跑200—400公里）

2013年3月13日19:23
中新社上海3月13日电 (记者 邹瑞玥)
（真假自辨，股市已经有反应了）

最新一期《自然》(Nature)杂志子刊《科学报道》(Sci.Report)刊发了复旦大学教授吴宇平课题组的一项重磅研究成果。这项关于水溶液锂电池体系的最新研究，可将锂电池性能提高80%。电动汽车只需充电10秒即可行驶400公里，这种电池成本低廉，安全不易爆炸。

吴宇平课题组13日向记者展示了这种锂电池体系。一片薄薄的金属锂，被特制的复合膜紧密包裹，将其置于pH值呈中性的水溶液中，与锂离子电池中传统的正极材料尖晶石锰酸锂组装，即可制成平均充电电压为4.2V、放电电压为4.0V的新型水锂电，这一成果大大突破了水溶液的理论分解电压1.23V。

据透露，目前普遍采用的是有机电解质动力锂离子电池。在大型的储能系统中，传统锂电池成本高，对生产条件要求高，并且由于有机电解质的物理化学性质，存在较大安全隐患。这也是目前电能汽车这样的新能源产品得不到大规模推广的主要阻碍。

吴宇平课题组的这项成果对发展新型的低成本、易大规模生产、安全环保的蓄电池体系提供了可能。据称，新型的水锂电采用水溶液作为电解质，阻燃性增强，使电池在使用过程中不易发烫发热，安全性能高；用高分子材料和无机材料制成复合膜，能将电池的能量损耗降到5%以下。

据估计，如果将这种电池用于手机，同样大小的电池至少能将手机通话时间延长一倍，成本则不足原有的一半；用于汽车同样如此，对环境构成的污染也比现有锂电池小得多。

吴宇平说，美国能源研究所已“瞄”上这项研究，希望与他达成合作意向。但他更希望能与国内有前瞻性的企业合作。他表示，“新型水锂电在生活中可具体应
用到各方各面，希望水锂电的突破能够
最终使消费者对安全放心、对成本接
受，解决目前全球踌躇不前的电动汽车
产业。”


论文：《使用被覆膜的金属锂作为阳极的水锂电池》：

SCIENTIFIC REPORTS | ARTICLE   

An Aqueous Rechargeable Lithium Battery Using Coated Li Metal as Anode
Xujiong Wang,   Yuyang Hou,   Yusong Zhu,   Yuping Wu   & Rudolf Holze

New energy industry including electric vehicles and large-scale energy storage in smart grids requires energy storage systems of good safety, high reliability, high energy density and low cost. Here a coated Li metal is used as anode for an aqueous rechargeable lithium battery (ARLB) combining LiMn2O4 as cathode and 0.5 mol l1 Li2SO4 aqueous solution as electrolyte. Due to the “cross-over” effect of Li+ ions in the coating, this ARLB delivers an output voltage of about 4.0 V, a big breakthrough of the theoretic stable window of water, 1.229 V. Its cycling is very excellent with Coulomb efficiency of 100% except in the first cycle. Its energy density can be 446 Wh kg1, about 80% higher than that for traditional lithium ion battery. Its power
efficiency can be above 95%. Furthermore, its cost is low and safety is much reliable. It provides another
chemistry for post lithium ion batteries.

链接如下：http://www.nature.com/srep/2013/ ... ep01401.html#/ref19

补充：
Based on the discharge voltages and the capacities of the Li metal anode and LiMn2O4 cathode, the discharge energy density of the ARLB based on the total mass of the electrode materials is 446 Wh kg1, much higher than those for the formerly reported ARLBs (30–45 Wh kg1)14, 15, 16, 17, 18, 19, 20, 21. Of course, it is higher than that for Li/aqueous M+ and the other redox flow batteries3, 4, 5, 9, 12. Based on the manufacturing technologies of lithium ion batteries, half of the energy density can be made practically available7, 14, which means that the practical energy density will be above 220 Wh kg1, about 80% higher than that for the corresponding Li-ion batteries for electric vehicles (120 Wh kg1 for C/organic electrolyte/LiMn2O4)6, 7. This high energy density indicates that a pure electric vehicle can run 200–400 km for one charge.（推测冲一次能跑200—400公里）