Raju, KumarHan, HVelusamy, DBJiang, QYang, HNkosi, FPPalaniyandy, NithyadharseniMakgopa, KBo, ZOzoemena, KI2020-07-272020-07-272020-03Raju, K. 2020. Rational design of 2D manganese phosphate hydrate nanosheets as pseudocapacitive electrodes. ACS Energy Letters, vol. 5, no. 1, pp. 23-302380-8195https://pubs.acs.org/doi/abs/10.1021/acsenergylett.9b02299DOI: 10.1021/acsenergylett.9b02299http://hdl.handle.net/10204/11521Copyright: 2020 ACS Publications. Due to copyright restrictions, the attached PDF file only contains the abstract of the full text item. For access to the full text item, please consult the publisher's website. The definitive version of the work is published in ACS Energy Letters, Vol. 5., no. 1, pp 23-30A new class of 2D nanosheets of nitrogen-integrated phosphate-rich ammonium manganese phosphate hydrate, (NH4MnPO4·H2O) (AMP), has been developed as pseudocapacitive electrode materials. The optimized electrodes exhibited device capacitances of 48.4 and 65.4 F/g for symmetric and asymmetric configurations, respectively. The devices showed excellent energy and power (e.g., 29.4 Wh/kg and 133 kW/kg for asymmetric cells) with extraordinary capacitance retention (e.g., >93%, 100 000 cycles at 5 A/g for asymmetric cells) that surpass those of most of the reported values. The huge pseudocapacitance of AMP is attributed to several factors, including the electroactive sites containing NH4+ ions, the conductive inorganic layers, intercalated water interactions of Mn2+···H2O, redox-active phosphate ions, and the 2D nanosheets. AMP-based all-solid-state flexible asymmetric devices exhibited >95% capacitance retention upon 1000 repetitive charge–discharge cycles. This study opens doors to elegant strategies of unlocking the rich physicoelectrochemical properties of 2D AMP for next-generation pseudocapacitors.en2D Manganese PhosphateAmmonium Manganese PhosphatesAMPPseudocapacitive ElectrodesArticleRaju, K., Han, H., Velusamy, D., Jiang, Q., Yang, H., Nkosi, F., ... Ozoemena, K. (2020). Rational design of 2D manganese phosphate hydrate nanosheets as pseudocapacitive electrodes. http://hdl.handle.net/10204/11521Raju, Kumar, H Han, DB Velusamy, Q Jiang, H Yang, FP Nkosi, Nithyadharseni Palaniyandy, K Makgopa, Z Bo, and KI Ozoemena "Rational design of 2D manganese phosphate hydrate nanosheets as pseudocapacitive electrodes." (2020) http://hdl.handle.net/10204/11521Raju K, Han H, Velusamy D, Jiang Q, Yang H, Nkosi F, et al. Rational design of 2D manganese phosphate hydrate nanosheets as pseudocapacitive electrodes. 2020; http://hdl.handle.net/10204/11521.TY - Article AU - Raju, Kumar AU - Han, H AU - Velusamy, DB AU - Jiang, Q AU - Yang, H AU - Nkosi, FP AU - Palaniyandy, Nithyadharseni AU - Makgopa, K AU - Bo, Z AU - Ozoemena, KI AB - A new class of 2D nanosheets of nitrogen-integrated phosphate-rich ammonium manganese phosphate hydrate, (NH4MnPO4·H2O) (AMP), has been developed as pseudocapacitive electrode materials. The optimized electrodes exhibited device capacitances of 48.4 and 65.4 F/g for symmetric and asymmetric configurations, respectively. The devices showed excellent energy and power (e.g., 29.4 Wh/kg and 133 kW/kg for asymmetric cells) with extraordinary capacitance retention (e.g., >93%, 100 000 cycles at 5 A/g for asymmetric cells) that surpass those of most of the reported values. The huge pseudocapacitance of AMP is attributed to several factors, including the electroactive sites containing NH4+ ions, the conductive inorganic layers, intercalated water interactions of Mn2+···H2O, redox-active phosphate ions, and the 2D nanosheets. AMP-based all-solid-state flexible asymmetric devices exhibited >95% capacitance retention upon 1000 repetitive charge–discharge cycles. This study opens doors to elegant strategies of unlocking the rich physicoelectrochemical properties of 2D AMP for next-generation pseudocapacitors. DA - 2020-03 DB - ResearchSpace DP - CSIR KW - 2D Manganese Phosphate KW - Ammonium Manganese Phosphates KW - AMP KW - Pseudocapacitive Electrodes LK - https://researchspace.csir.co.za PY - 2020 SM - 2380-8195 T1 - Rational design of 2D manganese phosphate hydrate nanosheets as pseudocapacitive electrodes TI - Rational design of 2D manganese phosphate hydrate nanosheets as pseudocapacitive electrodes UR - http://hdl.handle.net/10204/11521 ER -