Issues and opportunities of manganese-based materials for enhanced Zn-ion storage performances

Emerging two-dimensional nanostructured manganese-based materials for electrochemical energy storage: recent advances, mechanisms, challenges, and prospects

“…Although 2D nanostructured Mn-based electrode materials have made much remarkable progress in SCs and rechargeable MIBs, there are still some obstacles to overcome in order to adapt to future practical applications, such as poor conductivity and the dissolution of Mn 2+ ions. 277 In the above we have summarized some suggestions for optimizing 2D nanosheets or constructing 3D structures. Here, to alleviate the dissolution, improve the conductivity and strengthen the structural stability, some functionalized modifications are necessary.…”

Design of manganese dioxide for supercapacitors and zinc-ion batteries: similarities and differences

“…Distinct from those described for SCs above, the charge storage mechanisms of MnO 2 in aqueous ZIBs are relatively complicated, possibly involving the insertion/extraction of Zn 2+ , the co-insertion/extraction of H + and Zn 2+ and the reversible dissolution-deposition of MnO 2 /Mn 2+ [50] . Typically, although MnO 2 with tunnel structures that can accommodate Zn 2+ , such as α-MnO 2 (2 × 2 tunnels), β-MnO 2 (1 × 1 tunnels) and γ-MnO 2 (1 × 2 and 1 × 1 tunnels), are considered as promising cathodes for ZIBs, they suffer from irreversible phase conversions to layered structure, spinel structure (ZnMn 2 O 4 ) or both during discharge/charge, as shown in Figure 7A [114,115] .…”

“…In particular, based on the literature, complicated processes are involved when MnO 2 is applied in ZIBs, whereas pseudocapacitive behavior is understood in SCs. Although several articles have been published summarizing the applications of MnO 2 either in SCs or ZIBs, a comprehensive and comparative review to elucidate the similarity and difference in materials design for both devices is essential [50][51][52][53] . Herein, we focus on the recent advances in the design and utilization of MnO 2 in aqueous-based SCs and ZIBs.…”

Review on Recent Developments, Challenges, and Perspectives of Mn-Based Oxide Cathode Materials for Aqueous Zinc-Ion Batteries and the Status of Mn Resources in China

“…19 However, Mn-based oxides are abundant, environmentally friendly and inexpensive. 20 Although the scientific research on manganese-based oxide cathode materials has been deepened, there has been almost no systematic review in recent years, and there are few reports on the current situation of manganese resources in China. In order to fill this gap, in this review, we will systematically describe their energy storage mechanism and structural characteristics, discuss the application and development of Mn-based materials in AZIBs, and their performance optimization strategies, and analyze the performance improvement mechanism and limitations of the strategy.…”

“…Mn-based cathode materials have poor cycle stability and poor conductivity when charging and discharging . However, Mn-based oxides are abundant, environmentally friendly and inexpensive . Although the scientific research on manganese-based oxide cathode materials has been deepened, there has been almost no systematic review in recent years, and there are few reports on the current situation of manganese resources in China.…”