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Here you will find the news as well as a short guide to PTB

News

Schema der Operandozelle

Mit der Elektromobilität nimmt auch die Suche nach Alternativen zu den klassischen Lithium-Ionen-Batterien Fahrt auf. Eine der Kandidatinnen heißt Lithium-Schwefel-Batterie. Um herauszufinden, warum dieser Typ Batterie noch nicht seine maximal mögliche Kapazität und Lebensdauer erreicht, wurde in der Physikalisch-Technischen Bundesanstalt (PTB) ein Messsystem entwickelt, das im laufenden Betrieb der Batterie eingesetzt werden kann. Damit wurde ein möglicher Grund für die unerwünschte Alterung ermittelt: Polysulfide, kettenförmige Moleküle aus Lithium und Schwefel, die sich am Minuspol anreichern, sodass immer weniger Lithium und Schwefel für die Energiespeicherung zur Verfügung steht. Die Bewegung und Anreicherung der Polysulfide konnte mit zwei hochmodernen Analysemethoden mit Röntgenstrahlung der Synchrotronstrahlungsquelle BESSY II in Berlin molekülspezifisch beobachtet und dem jeweiligen Ladezustand zugeordnet werden. Die Messungen...

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Dr. Frank Lienesch

The 30th anniversary of COOMET (Euro-Asian Cooperation of National Metrology Institutions) calls to mind the dissolution of the Soviet Union as well as the reunification of Germany and the integration of the metrological divisions of the Amt für Standardisierung, Messwesen und Warenprüfung (Office for Standardization, Metrology and Quality Control – ASMW) of the former German Democratic Republic (GDR) into the Physikalisch-Technische Bundesanstalt (PTB). PTB has been a member of COOMET since its first year. Over the years, PTB has actively served as a connecting link between COOMET and EURAMET, the association of EU and EFTA state metrology institutes, and has been providing one of the four COOMET vice presidents. Dr. Frank Lienesch, Head of PTB’s Legal and International Metrology Division, was elected as the new Vice President of COOMET during the general assembly session (of the COOMET Committee) on 15 June.

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A brief introduction to PTB

Entrance of PTB Braunschweig

Here in a nutshell are a few Opens internal link in current windowFacts about PTB, or read the current facts and figures from the Opens internal link in current windowAnnual Report. If you want more details, here you will find a Opens internal link in current windowDescription of Tasks of PTB. Furthermore, we recommend our general Info Sheet about PTB which you can download in the right-hand column as a pdf file.

Important research topics

The SI with its 7 base units
In the new International System of Units (SI), seven fundamental constants are determined as defining reference values. (Diagram: PTB)

We present you with an overview of PTB's diverse research landscape as well as some especially highlighted topics in the chapter l Opens internal link in current windowResearch & Development, including the key strategic points in European metrology research (Opens internal link in current windowChallenges and Prospects) as well as the various success stories surrounding Opens internal link in current windowPTB's Technology Transfer. How firmly PTB is integrated in the international research landscape you can see briefly, on the one hand, in the Opens internal link in current windowOverview and, on the other hand, we individually present the respective research institutes of the worldwide metrology landscape in the chapter Opens internal link in current windowInternational Affairs.

Evaluations

Evaluation report (in Geman only)
Stand: Januar 2012

In 2002, PTB as a whole was evaluated – with an excellent outcome. In 2008, an evaluation of PTB research followed, carried out by the Wissenschaftsrat (German Council of Science and Humanities) with a subsequent Implementation Report in 2012. You will find more about this at Opens internal link in current windowPTB in the World of Research or in the pdfs of the evaluation reports which you can download in the right-hand column.

The next evaluation will follow in 2016.