Preparation and Property Optimization of High Capacity O3-type NaNi0.4Fe0.2Mn0.4O2

IF 4.3 3区 材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Xiaoning Li, Mengmeng Liu, Wenjuan Zhang, Yanli Zhang, Jiakun Zhou, Wenzhang Zhou, Naixin Wang, Weiwei Xu, KeHua Dai
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引用次数: 0

Abstract

O3-type NaNi0.4Fe0.2Mn0.4O2 cathode materials are structurally stable and have a high nickel content, allowing for stable high-capacity output. However, their performance needs further improvement. First, we investigated the effects of different sodium contents on the structure, morphology, and electrochemical performance of NaxNi0.4Fe0.2Mn0.4O2(x=0.85, 0.9, 0.95, 1, 1.05) materials. The Na0.9Ni0.4Fe0.2Mn0.4O2 material exhibited initial discharge specific capacities of 148.11 and 181.80 mAh·g-1 at voltage ranges of 2-4.1 V and 2-4.2 V, respectively. To further optimize the cycling performance of the material, we doped NaNi0.4Fe0.2Mn0.4O2 with different calcium contents. Ca2+ doping significantly enhanced the electrochemical performance of the material. Subsequently, we synthesized Na0.96Ca0.02(NMF)0.95Zn0.05O2, and the dual-doped NMF-Ca0.02Zn0.05 maintains approximately 80% capacity retention at 1-4.05 V, and around 70% as the cut-off voltage increases to 4.15 V in full cells.
高容量 O3 型 NaNi0.4Fe0.2Mn0.4O2 的制备与性能优化
O3 型 NaNi0.4Fe0.2Mn0.4O2 阴极材料结构稳定,镍含量高,可实现稳定的高容量输出。然而,它们的性能还需要进一步提高。首先,我们研究了不同钠含量对 NaxNi0.4Fe0.2Mn0.4O2(x=0.85、0.9、0.95、1、1.05)材料的结构、形态和电化学性能的影响。Na0.9Ni0.4Fe0.2Mn0.4O2 材料在 2-4.1 V 和 2-4.2 V 电压范围内的初始放电比容量分别为 148.11 和 181.80 mAh-g-1。为了进一步优化材料的循环性能,我们在 NaNi0.4Fe0.2Mn0.4O2 中掺入了不同含量的钙。Ca2+ 的掺杂大大提高了材料的电化学性能。随后,我们合成了 Na0.96Ca0.02(NMF)0.95Zn0.05O2,双掺杂 NMF-Ca0.02Zn0.05 在 1-4.05 V 电压下可保持约 80% 的容量保持率,而在完整电池中,当截止电压升高到 4.15 V 时,容量保持率约为 70%。
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来源期刊
CiteScore
7.20
自引率
4.30%
发文量
567
期刊介绍: ACS Applied Electronic Materials is an interdisciplinary journal publishing original research covering all aspects of electronic materials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials science, engineering, optics, physics, and chemistry into important applications of electronic materials. Sample research topics that span the journal's scope are inorganic, organic, ionic and polymeric materials with properties that include conducting, semiconducting, superconducting, insulating, dielectric, magnetic, optoelectronic, piezoelectric, ferroelectric and thermoelectric. Indexed/​Abstracted: Web of Science SCIE Scopus CAS INSPEC Portico
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