High-Quality 2D SnP3 Nanosheets: Novel Flexible Electrode for Energy Storage Device Application with Wide Temperature Adaptivity
High-Quality 2D SnP3 Nanosheets: Novel Flexible Electrode for Energy Storage Device Application with Wide Temperature Adaptivity
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DOI：
10.1021/acsmaterialslett.3c01438
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发表时间：
2023-12
影响因子：
11.4
通讯作者：
Miaomiao Yan;Bingchao Yang;Xiujie Sun;Zhixiu Wang;Xingang Jiang;Wen-cai Yi;Hairui Sun;
中科院分区：
文献类型：
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作者：
Miaomiao Yan;Bingchao Yang;Xiujie Sun;Zhixiu Wang;Xingang Jiang;Wen-cai Yi;Hairui Sun;
三磷化锡（SnP 3）具有与菱面体黑磷（BP）相似的二维层状结构，由于其上级BP更高的电导率和更快的离子迁移率，在高性能储能器件中具有潜在的应用前景。寻找一种可行的策略来生产高质量的SnP 3材料是工业器件应用的重要先决条件;然而，到目前为止，它仍然是一个技术挑战。采用高压高温法成功合成了大尺寸SnP 3晶体（直径8 mm，最大晶粒尺寸42.6 μm），其元素分布均匀，具有良好的金属性能，在300 K时电导率为1.23 × 106 S m-1，是BP的3000倍以上。采用液相剥离法制备了平均厚度为6.2 nm、最大横向尺寸为9.5 μm的高质量二维SnP 3纳米片。我们的研究结果表明，由碳纳米管（CNT）复合的所制造的SnP 3 NS作为柔性超级电容器电极材料表现出高的电化学性能，具有优异的循环稳定性（20，000次循环后88%的电容保持率）和出色的机械柔性（在180°的弯曲角度下72%的电容保持率）。具有SnP 3/CNT电极的组装超级电容器在−50至60 °C的宽范围内显示出良好的温度耐受性，在6，000次冷却-加热循环后显示出82.3%的电容保持率。这项研究表明，生产的SnP 3 NS能够在极端恶劣的条件下开发用于柔性储能设备的可靠电极，包括强折叠和低温环境。
Tin triphosphide (SnP3), featured with a 2D layered structure similar to rhombohedral black phosphorus (BP), has garnered significant attention for its potential application in high-performance energy storage devices due to the high electrical conductivity and fast ionic mobility superior to BP. Searching for a feasible strategy to produce high-quality SnP3materials is a vital prerequisite for industrial device applications; however, thus far it remains a technical challenge. In this work, we report the successful synthesis of large-size crystalline SnP3(8 mm in diameter and maximal grain size up to 42.6 μm) with a uniform elemental distribution by a high-pressure and high-temperature method, which exhibits good metallic behavior with electrical conductivity of 1.23 × 106S m–1at 300 K, above 3000 times higher than that of BP. High-quality 2D SnP3nanosheets (NSs) with a mean thickness of 6.2 nm and a largest lateral size of 9.5 μm are achieved by a liquid-phase exfoliation method. Our results show that the fabricated SnP3NSs composited by carbon nanotubes (CNTs) exhibit high electrochemical performance as flexible supercapacitor electrode materials with excellent cycle stability (88% retained capacitance after 20,000 cycles) and outstanding mechanical flexibility (72% capacitance remaining at a bending angle of 180°). The assembled supercapacitor with SnP3/CNT electrodes shows good temperature tolerance over a wide range from −50 to 60 °C, which displays 82.3% capacitance retention after 6,000 cooling–heating cycles. This study reveals that the produced SnP3NSs enable the development of reliable electrodes for flexible energy storage devices under extremely harsh conditions, including strong folding and low-temperature environments.