由于钠具有资源丰富和成本低廉的优势,钠离子电池再次受到科学界和工业界的广泛关注。发展低成本、性能优异的正极材料对于钠离子电池至关重要。本文通过向O3-Na_(0.90)[Cu_(0.22)Fe_(0.30)Mn_(0.48)]O_2材料中引入容易变价的Ni^(2+)得...由于钠具有资源丰富和成本低廉的优势,钠离子电池再次受到科学界和工业界的广泛关注。发展低成本、性能优异的正极材料对于钠离子电池至关重要。本文通过向O3-Na_(0.90)[Cu_(0.22)Fe_(0.30)Mn_(0.48)]O_2材料中引入容易变价的Ni^(2+)得到一种不含Mn^(3+)的钠离子电池新型正极材料O3-NaCu_(1/9)Ni_(2/9)Fe_(1/3)Mn_(1/3)O_2,该材料具有127 m A·h/g可逆比容量和3.1 V平均放电电压。由该正极与硬碳球负极组装成全电池具有248 W·h/kg的理论能量密度,高达93%的能量转化效率和优异的循环性能。展开更多
In order to achieve better Na storage performance, most layered oxide positive electrode materials contain toxic and expensive transition metals Ni and/or Co, which are also widely used for lithium-ion batteries. Here...In order to achieve better Na storage performance, most layered oxide positive electrode materials contain toxic and expensive transition metals Ni and/or Co, which are also widely used for lithium-ion batteries. Here we report a new quaternary layered oxide consisting of Cu, Fe, Mn, and Ti transition metals with O3-type oxygen stacking as a positive electrode for room-temperature sodium-ion batteries. The material can be simply prepared by a high-temperature solidstate reaction route and delivers a reversible capacity of 94 m Ah/g with an average storage voltage of 3.2 V. This paves the way for cheaper and non-toxic batteries with high Na storage performance.展开更多
文摘由于钠具有资源丰富和成本低廉的优势,钠离子电池再次受到科学界和工业界的广泛关注。发展低成本、性能优异的正极材料对于钠离子电池至关重要。本文通过向O3-Na_(0.90)[Cu_(0.22)Fe_(0.30)Mn_(0.48)]O_2材料中引入容易变价的Ni^(2+)得到一种不含Mn^(3+)的钠离子电池新型正极材料O3-NaCu_(1/9)Ni_(2/9)Fe_(1/3)Mn_(1/3)O_2,该材料具有127 m A·h/g可逆比容量和3.1 V平均放电电压。由该正极与硬碳球负极组装成全电池具有248 W·h/kg的理论能量密度,高达93%的能量转化效率和优异的循环性能。
基金supported by the National Natural Science Foundation of China(Grant Nos.51222210 and 11234013)the One Hundred Talent Project of the Chinese Academy of Sciences
文摘In order to achieve better Na storage performance, most layered oxide positive electrode materials contain toxic and expensive transition metals Ni and/or Co, which are also widely used for lithium-ion batteries. Here we report a new quaternary layered oxide consisting of Cu, Fe, Mn, and Ti transition metals with O3-type oxygen stacking as a positive electrode for room-temperature sodium-ion batteries. The material can be simply prepared by a high-temperature solidstate reaction route and delivers a reversible capacity of 94 m Ah/g with an average storage voltage of 3.2 V. This paves the way for cheaper and non-toxic batteries with high Na storage performance.
