Cu3(PO4)2: Novel Anion Convertor for Aqueous Dual-Ion Battery

Abstract

Highlights A novel anion electrode Cu 3 (PO 4 ) 2 is proposed at the first time. The reaction mechanism of Cu 3 (PO 4 ) 2 electrode is investigated. The dual-ion cell is constructed by using pretreated Cu 3 (PO 4 ) 2 and Na 0.44 MnO 2 . Supplementary Information The online version of this article (10.1007/s40820-020-00576-1) contains supplementary material, which is available to authorized users.

Prussian Blue Analogues in Aqueous Batteries and Desalination Batteries

“…To solve these environmental problems, scientists are beginning to explore renewable energy sources to reduce environmental pollution and meet the needs of social development [1][2][3][4][5]. However, these clean energy sources generally have the disadvantages of location dependence [6][7][8][9][10], high cost and low efficiency, which restrict their large-scale applications [11][12][13][14][15][16]. In this case, a lot of attentions have been paid to the developments of rechargeable batteries [17][18][19][20][21][22], fuel cells [23][24][25][26][27][28][29] and supercapacitors [30][31][32][33][34][35], among which the rechargeable batteries have received the most attention.…”

Charge Carriers for Aqueous Dual‐Ion Batteries

“…The reaction of OH À ion with Cu 3 (PO 4 ) 2 electrode under quasi-neutral electrolyte, provides a flat plateau at À 0.4 V vs. Ag/AgCl with reversible capacity of around 115 mAh g À 1 . [76] During the discharge process, Cu 3 (PO 4 ) 2 is decomposed to Cu 2 O at the beginning at À 1.4 V vs. Ag/AgCl, and then converted to Cu at À 0.4 V (Figure 5c,d). In the subsequently charging and discharging processes, Cu is reacted with OH À forming Cu 2 O.…”

“…Hydroxide ion can act as anion carrier through conversion mechanism. The reaction of OH − ion with Cu 3 (PO 4 ) 2 electrode under quasi‐neutral electrolyte, provides a flat plateau at −0.4 V vs. Ag/AgCl with reversible capacity of around 115 mAh g −1 [76] . During the discharge process, Cu 3 (PO 4 ) 2 is decomposed to Cu 2 O at the beginning at −1.4 V vs. Ag/AgCl, and then converted to Cu at −0.4 V (Figure 5c,d).…”

Spreading the Landscape of Dual Ion Batteries: from Electrode to Electrolyte

“…The use of non-flammable aqueous electrolytes can be a good way to eliminate this safety hazard. [192] Relatively few DIBs with aqueous electrolytes have been reported, with recent reports of DIBs based on aqueous NaCl [193] and aqueous NaF solutions, [194] NH 4 NO 3 solutions, [195] and so on. Compared to the dual ion cells using organic solvents, the operating voltage of aqueous DIBs is relatively low due to the lower decomposition voltage of water.…”