使用用于能量存储的一般方法发展具有成本效益的过渡金属磷化物(TMP)是关键但具有挑战性的。此外,贵金属的不存在和TMP的高电催化活性使其可用作析氧反应(OER)中的催化剂。在这里,通过一步水热技术将CoNiP-CoP2(CNP-CP)复合材料原位沉积在碳织物上。CNP-CP揭示了混合纳米结构(3D-on-1DHNA),即,腰果状纳米结构和纳米锥。CNP-CPHNA电极比其他电极提供更高的面积容量(82.8μAhcm-2)。此外,用CNP-CPHNA组装的混合电池显示出31μWhcm-2和10.9mWcm-2的最大能量和功率密度,分别。独家,混合电池在30000次循环中表现出显著的耐久性。原位/操作X射线吸收近边缘结构分析证实了在实时电化学反应过程中CNP-CP材料中Co和Ni元素的化合价的可逆变化。此外,准固态设备通过为电子元件供电来展示其实用性。同时,CNP-CPHNA通过显示较低的过电位(230mV)证实其比其他催化剂更高的OER活性。此外,它表现出相对较小的Tafel斜率(38mVdec-1)和24小时内稳定的OER活性。这种制备策略可能会启动用于多功能应用的高级TMP基材料的设计。
Evolving cost-effective transition metal phosphides (TMPs) using general approaches for energy storage is pivotal but challenging. Besides, the absence of noble metals and high electrocatalytic activity of TMPs allow their applicability as catalysts in oxygen evolution reaction (OER). Herein, CoNiP-CoP2 (CNP-CP) composite is in situ deposited on carbon fabric by a one-step hydrothermal technique. The CNP-CP reveals hybrid nanoarchitecture (3D-on-1D HNA), i.e., cashew fruit-like nanostructures and nanocones. The CNP-CP HNA electrode delivers higher areal capacity (82.8 μAh cm-2 ) than the other electrodes. Furthermore, a hybrid cell assembled with CNP-CP HNA shows maximum energy and power densities of 31 μWh cm-2 and 10.9 mW cm-2 , respectively. Exclusively, the hybrid cell demonstrates remarkable durability over 30 000 cycles. In situ/operando X-ray absorption near-edge structure analysis confirms the reversible changes in valency of Co and Ni elements in CNP-CP material during real-time electrochemical reactions. Besides, a quasi-solid-state device unveils its practicability by powering electronic components. Meanwhile, the CNP-CP HNA verifies its higher OER activity than the other catalysts by revealing lower overpotential (230 mV). Also, it exhibits relatively small Tafel slope (38 mV dec-1 ) and stable OER activity over 24 h. This preparation strategy may initiate the design of advanced TMP-based materials for multifunctional applications.