Air Stable O3-Type Cathode Material with Nanometer Size for Durable Low-Temperature Sodium-Ion Batteries,ACS Applied Energy Materials

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Air Stable O3-Type Cathode Material with Nanometer Size for Durable Low-Temperature Sodium-Ion Batteries
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2024-04-18 , DOI: 10.1021/acsaem.4c00466
Yan Jin ₁ , Yunbo Li ₁ , Jianguo Li ₁ , Hongyan Zhou ₁ , Xianghong Chen ₁ , Pan Jiang ₁ , Qinghua Fan ₁ , Quan Kuang ₁ , Youzhong Dong ₁ , Yanming Zhao _{1,

2}

Affiliation

The application of sustainable sodium-ion batteries (SIBs) in large-scale electrical grids is primarily hindered by the bad cycling lifetime and cryogenic performance. To address these issues, we propose an O3-NaNi_0.455Cu_0.05Mn_0.485Sb_0.01O₂ (NaNCMS) cathode material via Cu and Sb codoping. This NaNCMS material can preserve pristine structural and electrochemical properties when suffering from high humidity. The bulk-like shapes with nanoscale and balanced Na⁺ diffusion kinetics enable the NaNCMS cathode to have a high reversible capacity (134 mAh g^–1 at 0.2C) and improved rate capability at room temperature. The monoclinic O′3 phase, which is responsible for huge structure reconstruction and volume change in pristine NaNi_0.5Mn_0.5O₂, is inhibited by Cu–Sb substitution. Hence, a better cycling stability is presented for the NaNCMS cathode. Moreover, excellent electrochemical properties are exhibited at −15 °C. The low-temperature battery based on the NaNCMS cathode holds high reversible capacities of 126, 119, and 112 mAh g^–1 at 0.2 0.5, and 1C, respectively. It also demonstrates a capacity retention of 72% with a final capacity of 81 mAh g^–1 after 400 cycles (1C) and 62% after 1000 cycles (3C) at −15 °C.

中文翻译：

用于耐用低温钠离子电池的纳米尺寸空气稳定O3型正极材料

可持续钠离子电池（SIB）在大规模电网中的应用主要受到循环寿命和低温性能不佳的阻碍。为了解决这些问题，我们提出了一种通过Cu和Sb共掺杂的O3-NaNi _0.455 Cu _0.05 Mn _0.485 Sb _0.01 O ₂ (NaNCMS)正极材料。这种 NaNCMS 材料在高湿度下可以保持原始的结构和电化学特性。具有纳米级和平衡Na ⁺扩散动力学的块状形状使NaNCMS 阴极具有高可逆容量（0.2C 时为134 mAh g ^–1）并提高了室温下的倍率性能。单斜 O'3 相在原始 NaNi _0.5 Mn _0.5 O ₂中引起巨大的结构重建和体积变化，但受到 Cu-Sb 取代的抑制。因此，NaNCMS 阴极具有更好的循环稳定性。此外，在-15℃下表现出优异的电化学性能。基于NaNCMS正极的低温电池在0.2、0.5和1C下分别具有126、119和112 mAh g ^–1的高可逆容量。它还表明，在 -15 °C 下，400 次循环 (1C) 后容量保持率为 72%，最终容量为 81 mAh g ^–1，1000次循环后 (3C) 容量保持率为 62%。

更新日期：2024-04-18

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