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New-type K 0 . 7 Fe 0 . 5 Mn 0 . 5 O 2 cathode with an expanded and stabilized interlayer structure for high-capacity sodium-ion batteries
| Content Provider | Semantic Scholar |
|---|---|
| Author | Wanga, Xuanpeng Hua, Ping Niua, Chaojiang Menga, Jiashen Xua, X. George Weia, Xiujuan Tanga, Chunjuan Luoa, Wen Zhoua, Liang Ana, Qinyou Maia, Luis |
| Copyright Year | 2017 |
| Abstract | The delivery of cathodes with both high capacity and excellent cycling stability is a great challenge in the development of sodium-ion batteries (SIBs) for energy storage systems. Here, we exploited a novel potassiumion-intercalated layered iron/manganese-based material (K0.7Fe0.5Mn0.5O2). On the basis of advanced in situ and ex situ X-ray diffraction analysis, we confirm that K0.7Fe0.5Mn0.5O2 can provide highly reversible layer spacing variations and an ultra-stable skeleton structure during the sodiation/desodiation processes. As a result, K0.7Fe0.5Mn0.5O2 displays superior performance, with both high capacity and superior cycling stability, as a cathode for SIBs. A high discharge capacity of 181 mAh g is achieved at 100 mA g. Remarkably, even when cycled at high rate of 1000 mA g, 85% of the initial discharge capacity is maintained after 1000 cycles. These results indicate that K0.7Fe0.5Mn0.5O2 is a promising candidate for high-capacity and long-life SIBs. Additionally, this work will provide a unique insight into the development of high-performance cathodes for |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://mai.group.whut.edu.cn/pub/2017/201703/P020170509329425680088.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
