英國皇家化學會（RSC）是一個超過175年歷史的面向全球化學家的非營利會員制機構，旗下擁有44種期刊，其中很多在化學領域有很高影響力。為了進一步幫助廣大讀者追蹤科技前沿熱點，X-MOL團隊與英國皇家化學會合作，推出英國皇家化學會期刊主編推薦的精彩文章快覽，本期文章屬“材料領域”，英文點評來自英國皇家化學會期刊的主編。如果大家對我們的解讀有更多的補充和點評，歡迎在文末寫評論發表您的高見！

Chemical Science （IF: 9.063）

1. Highly reversible potassium-ion intercalation in tungsten disulfideChem. Sci., 2019, Advance Article

DOI: 10.1039/C8SC04350G

Potassium-ion batteries （PIBs） are a potential alternative to Li-ion batteries, however, intercalation of large K+ can lead to structural degradation and therefore short lifespan of the hosts. Scientists in China have developed a new tungsten disulfide host for intercalation of K+. The material exhibits exceptional structural stability and lifespan, as well as record cyclability for chalcogenides.

鉀離子電池（PIB）是鋰離子電池的潛在替代者，然而，大量鉀離子的嵌入會導致主體的結構性降解，從而造成壽命縮短。中國科學院福建物質結構研究所的科學家們開發出了一種新的二硫化鎢主體可以用于鉀離子的嵌入。該材料具有出色的結構穩定性和壽命，以及硫屬化物創紀錄的循環性能。

Open Access掃描或長按二維碼，識別后直達原文頁面

2. Picosecond multi-hole transfer and microsecond charge-separated states at the perovskite nanocrystal/tetracene interfaceChem. Sci., 2019, Advance Article

DOI: 10.1039/C8SC04408B

A team of Chinese researchers have discovered that tetracene molecules can enable ultrafast and efficient hole transfer from lead halide perovskite nanocrystals, where it is sometimes kinetically slower than electron transfer leading to limited efficiency of optoelectronic devices. The charge-separated states are shown to be long-lived, and this allows the dissociation of up to 5.6 excitons per nanocrystal by multi-hole transfer for the first time.

中國科學院大連化學物理研究所的研究人員發現并四苯分子可以實現鉛鹵化物鈣鈦礦納米晶體中超快高效的空穴傳輸。空穴傳輸在動力學上有時要慢于電子傳輸，從而導致光電器件的效率受限。研究發現電荷分離狀態存在壽命長，并且通過多空穴傳輸首次實現了每納米晶體高達5.6個激子的解離。

Open Access掃描或長按二維碼，識別后直達原文頁

Materials Horizons （IF: 13.183）

1. Regulation of carbon content in MOF-derived hierarchical-porous NiO@C films for high-performance electrochromismMater. Horiz., 2019, Advance Article

DOI: 10.1039/c8mh01091a

Efficient insertion/extraction of electrons/ions in electrode materials is crucial for high-performance electrochromic （EC） devices. In this communication, the superiority of MOF derivatives as electrode materials is regarded in the EC field for the first time. For this purpose, we first develop a general pyrolysis strategy for material preparation, and reveal the detailed catalytic graphitization and metal oxidation process in the MOF involved self-templating synthesis. Second, by intentional regulation of in situ carbon, we demonstrate that high electrical conductivity and fast ionic diffusion are simultaneously achieved in the as-synthesized MOF derivatives. Finally, it is confirmed that MOF-derived EC electrodes exhibit superior and stable properties. Based on the above results, we introduce the first proof-of-concept MOF-derived EC device, which has promising potential in various practical applications such as in wearable technologies.

電極材料中電子/離子的有效插入/提取對于高性能電致變色器件至關重要。本文首次確認了在電致變色器件中將金屬有機框架（MOF）衍生物作為電極材料的優越性。為此，作者首先開發了一種用于材料制備的通用熱解策略，并揭示了包含MOF自模板合成的催化石墨化和金屬氧化詳細過程。其次，通過調節原位碳，作者證明了合成的MOF衍生物能夠同時實現高電導率和快速離子擴散。最后，作者證實了MOF衍生的電致變色電極表現出優異和穩定的性能。基于上述結果，作者介紹了首個概念驗證的MOF衍生電致變色器件，該器件在諸如可穿戴技術等各種實際應用中具有很大潛力。

詳情請點里鏈接：RSC主編推薦：材料領域精彩文章快覽（免費閱讀原文）